diff --git a/.github/workflows/nmc-custom-build.yml b/.github/workflows/nmc-custom-build.yml
new file mode 100644
index 0000000000000..e9a3dae3b2222
--- /dev/null
+++ b/.github/workflows/nmc-custom-build.yml
@@ -0,0 +1,172 @@
+name: MagentaCLOUD custom build strategy
+
+# Test call: act --container-architecture linux/amd64 --secret-file ../secrets.env --env-file ../nmc-master-build.env -j build-custom
+
+# we already try to build a custom release as soon as people
+# created a customisation PR
+on:
+  workflow_dispatch:
+
+env:
+  TARGET_TRUNK: "master"
+  TARGET_STABLE: "nmcstable/25.0.6"
+  CUSTOM_REPO: ${{ github.repository }}
+  CUSTOM_BRANCH: ${{ github.ref }}
+  BUILD_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  # BUILD_TOKEN: ${{ secrets.BUILD_TOKEN }}
+
+
+jobs:
+  build-custom:
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: "Find customisation candidates"
+        uses: octokit/graphql-action@v2.x
+        id: find_customisations
+        env:
+          GITHUB_TOKEN: ${{ env.BUILD_TOKEN }}
+        with:
+          query: |
+            query findCustomisations($searchexpr: String!) {
+              search(query: $searchexpr, type: ISSUE, first: 100) {
+                edges {
+                  node {
+                    ... on PullRequest {
+                      state
+                      number
+                      title
+                      baseRefName
+                      headRefName
+                      mergeable
+                      isDraft
+                      url
+                    }
+                  }
+                }
+              }
+            }
+          searchexpr: "type:pr state:open repo:${{ env.CUSTOM_REPO }} base:${{ env.TARGET_TRUNK }} base:${{ env.TARGET_STABLE }} label:custom label:build-ready"
+          # note that the search has OR semantice for base:, but AND semantice for label: !
+          # see: https://docs.github.com/en/search-github/searching-on-github/searching-issues-and-pull-requests#search-by-label
+      - id: customisations
+        run: |
+          pulls=$(echo '${{ steps.find_customisations.outputs.data }}' | jq -s '.[].search.edges | map(.node) | sort_by(.headRefName)')
+          echo ::set-output name=pulls::$pulls
+
+      - name: Picking backports
+        id: pickbackports
+        uses: actions/github-script@v6
+        env:
+          customisations: ${{ steps.customisations.outputs.pulls }}
+          target_trunk: ${{ env.TARGET_TRUNK }}
+          target_stable: ${{ env.TARGET_STABLE }}
+        with:
+          script: |
+            const customisations = JSON.parse(process.env.customisations);
+            const target_trunk   = process.env.target_trunk;
+            const target_stable  = process.env.target_stable;
+
+            function shuffleArray(array) {
+                return array.reduce((acc, current, index) => {
+                        const randomIndex = Math.floor(Math.random() * (index + 1));
+                        [acc[index], acc[randomIndex]] = [acc[randomIndex], acc[index]];
+                        return acc;
+                    }, [...array]);
+            }
+
+            function isBackportFor(port, master) {
+                if (( port.baseRefName === target_stable ) &&
+                    ( master.baseRefName === target_trunk ) && 
+                    ( port.headRefName.startsWith( master.headRefName ))) {
+                    return true;  
+                } else {
+                    return false;
+                }
+            }
+
+            if ( target_stable == target_trunk ) {
+                // only sort out backports it it is not a master build
+                // which means that the target stable branch is not the name for the trunk branch
+                core.setOutput('buildparts', JSON.stringify(shuffleArray(customisations)) );
+                core.setOutput('newerparts', JSON.stringify([]) );
+                return "";            
+            }
+
+            var buildparts = [];
+            var newerparts =[];
+
+            for (cIdx=0; cIdx < customisations.length; cIdx++) {
+                if (cIdx+1 < customisations.length) {
+                    // detect master - backport pairs
+                    if (isBackportFor( customisations[cIdx], customisations[cIdx+1] )) {
+                        buildparts.push(customisations[cIdx]);
+                        newerparts.push(customisations[cIdx+1]);
+                        cIdx++;
+                    } else if (isBackportFor( customisations[cIdx+1], customisations[cIdx] )) {
+                        buildparts.push(customisations[cIdx+1]);
+                        newerparts.push(customisations[cIdx]);
+                        cIdx++;
+                    } else {
+                        // handle as single entry
+                        buildparts.push(customisations[cIdx]);
+                    }
+                } else {
+                    // handle as last entry
+                    buildparts.push(customisations[cIdx]);
+                }
+            }
+            core.setOutput('buildparts', JSON.stringify(shuffleArray(buildparts)) );
+            core.setOutput('newerparts', JSON.stringify(shuffleArray(newerparts)) );
+            return "";            
+
+      # we exclude non-mergeable branches and exclude them from build
+      - name: Check mergeability
+        id: checkmergeable
+        uses: actions/github-script@v6
+        env:
+          buildparts: ${{ steps.pickbackports.outputs.buildparts }}
+        with:
+          script: |
+            const buildparts = JSON.parse(process.env.buildparts);
+            var   mergeableparts = [];
+            result = 0;
+
+            buildparts.forEach( (buildpart) => {
+                if ( buildpart.mergeable === 'MERGEABLE' ) {
+                   mergeableparts.push(buildpart);
+                } else {
+                   notMergeableError = `${buildpart.mergeable} #${buildpart.number}: Incomplete package, lacking '${buildpart.title}'! `
+                   core.error(notMergeableError);
+                   result++;
+                }
+            });
+            core.setOutput('mergeableparts', JSON.stringify(mergeableparts) );
+            return result;
+
+      - name: Checkout build target branch
+        uses: actions/checkout@v3
+        with:
+          repository: ${{ env.CUSTOM_REPO }}
+          ref: ${{ env.CUSTOM_BRANCH }}
+          fetch-depth: 1
+          token: ${{ secrets.BUILD_TOKEN }}
+      - run: |
+          git rebase --onto ${{ env.TARGET_STABLE }} ${{ env.CUSTOM_BRANCH }} 
+
+        # todo do merge trials for all newerparts
+        # if one successfully merges with stable branch
+        # it is a potential candidate to replace a backport
+        # with a master patch
+
+      - name: Custom merges
+        id: custommerge
+        run:
+          echo ::debug::Merging for '${{ env.TARGET_STABLE }}' on '${{ env.CUSTOM_BRANCH }}'
+          for mergepull in $(echo '${{ steps.checkmergeable.outputs.mergeableparts }}' | jq -r '.[]')
+          do
+            head=$(echo $mergepull | jq -r '.headRefName')
+            base=$(echo $mergepull | jq -r '.baseRefName')
+            echo "::group::$head(type:$base)--->$TARGET_STABLE"
+            echo "::endgroup::"
+          done
\ No newline at end of file
diff --git a/apps/files/js/filelist.js b/apps/files/js/filelist.js
index e3052ea9fe85b..44b4b7dfbef5c 100644
--- a/apps/files/js/filelist.js
+++ b/apps/files/js/filelist.js
@@ -376,6 +376,9 @@
 
 			this.$el.on('show', this._onResize);
 
+			this.resizeFileActionMenu = _.debounce(_.bind(this.resizeFileActionMenu, this), 250);
+			$(window).resize(this.resizeFileActionMenu);
+
 			// reload files list on share accept
 			$('body').on('OCA.Notification.Action', function(eventObject) {
 				if (eventObject.notification.app === 'files_sharing' && eventObject.action.type === 'POST') {
@@ -677,6 +680,7 @@
 		 * @param {boolean} [show=true] whether to open the sidebar if it was closed
 		 */
 		_updateDetailsView: function(fileName, show) {
+			this.resizeFileActionMenu();
 			if (!(OCA.Files && OCA.Files.Sidebar)) {
 				console.error('No sidebar available');
 				return;
@@ -1501,6 +1505,12 @@
 			this.fileMultiSelectMenu.render();
 			this.$el.find('.selectedActions .filesSelectMenu').remove();
 			this.$el.find('.selectedActions').append(this.fileMultiSelectMenu.$el);
+			this.fileMultipleSelectionMenu = new OCA.Files.FileMultipleSelectionMenu(this.multiSelectMenuItems.sort(function(a, b) {
+				return a.order - b.order
+			}));
+			this.fileMultipleSelectionMenu.render();
+			this.$el.find('.selectedActions .filesSelectionMenu').remove();
+			this.$el.find('.selectedActions').append(this.fileMultipleSelectionMenu.$el);
 		},
 
 		/**
@@ -3501,6 +3511,72 @@
 			}
 		},
 
+			/**
+		 * Show or hide file action menu based on the current selection
+		*/
+		resizeFileActionMenu: function() {
+			const appList = this.$el.find('.filesSelectionMenu ul li:not(.hidden-action)');
+			const appListWidth = 179;
+			const checkWidth = Math.ceil(this.$el.find('.column-selection').outerWidth());
+			const headerNameWidth = Math.ceil(this.$el.find('.column-name').outerWidth());
+			const actionWidth = Math.ceil(this.$el.find('#selectedActionLabel').outerWidth());
+			const allLabelWidth = Math.ceil(this.$el.find('#allLabel').not('#allLabel:hidden').outerWidth());
+			let headerWidth = Math.ceil(this.$el.find('.files-filestable thead').outerWidth());
+
+			if($('#app-sidebar-vue').length>0){
+				headerWidth = headerWidth - Math.ceil($('#app-sidebar-vue').outerWidth());
+			}
+
+			var availableWidth;
+			if(!allLabelWidth){
+				availableWidth = headerWidth - (checkWidth + headerNameWidth);
+			}
+			else{
+				availableWidth = headerWidth - (checkWidth + allLabelWidth+ headerNameWidth);
+			}
+
+			let appCount = Math.floor((availableWidth / appListWidth));
+
+			if(appCount < appList.length) {
+
+				if(!allLabelWidth){
+					availableWidth = headerWidth - (checkWidth + headerNameWidth + actionWidth);
+				}
+				else{
+					availableWidth = headerWidth - (checkWidth + allLabelWidth+ headerNameWidth + actionWidth);
+				}
+					appCount = Math.floor((availableWidth / appListWidth));
+			}
+
+			var summary = this._selectionSummary.summary;
+			if (summary.totalFiles === 0 && summary.totalDirs === 0) {
+				this.$el.find('#selectedActionLabel').css('display','none');
+			}
+			else{
+				if(appCount < appList.length) {
+					this.$el.find('#selectedActionLabel').css('display','block');
+				}
+				else if(appCount == appList.length){
+					this.$el.find('#selectedActionLabel').css('display','none');
+				}
+				else if (!isFinite(appCount))
+				{
+					this.$el.find('#selectedActionLabel').css('display','block');
+				}
+				else if(appCount > appList.length){
+					this.$el.find('#selectedActionLabel').css('display','none');
+				}
+			}
+
+			for (let k = 0; k < appList.length; k++) {
+				if (k < appCount) {
+					$(appList[k]).removeClass('hidden');
+				} else {
+					$(appList[k]).addClass('hidden');
+				}
+			}
+		},
+
 		/**
 		 * Check whether all selected files are copiable
 		 */
diff --git a/apps/files/js/filemultipleselectionmenu.js b/apps/files/js/filemultipleselectionmenu.js
new file mode 100644
index 0000000000000..fd42a21dbb71b
--- /dev/null
+++ b/apps/files/js/filemultipleselectionmenu.js
@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2018
+ *
+ * This file is licensed under the Affero General Public License version 3
+ * or later.
+ *
+ * See the COPYING-README file.
+ *
+ */
+
+(function() {
+	var FileMultipleSelectionMenu = OC.Backbone.View.extend({
+		tagName: 'div',
+		className: 'filesSelectionMenu',
+		_scopes: null,
+		initialize: function(menuItems) {
+			this._scopes = menuItems;
+		},
+		events: {
+			'click a.action': '_onClickAction'
+		},
+
+		/**
+		 * Renders the menu with the currently set items
+		 */
+		render: function() {
+			this.$el.html(OCA.Files.Templates['filemultiselectmenu']({
+				items: this._scopes
+			}));
+		},
+		/**
+		 * Displays the menu under the given element
+		 *
+		 * @param {OCA.Files.FileActionContext} context context
+		 * @param {Object} $trigger trigger element
+		 */
+		 show: function(context) {
+			this._context = context;
+			return false;
+		},
+		toggleItemVisibility: function (itemName, show) {
+			var toggle= $('.filesSelectionMenu');
+			if (show) {
+				toggle.find('.item-' + itemName).removeClass('hidden-action');
+			} else {
+				toggle.find('.item-' + itemName).addClass('hidden-action');
+			}
+		},
+		updateItemText: function (itemName, translation) {
+			this.$el.find('.item-' + itemName).find('.label').text(translation);
+		},
+		toggleLoading: function (itemName, showLoading) {
+			var $actionElement = this.$el.find('.item-' + itemName);
+			if ($actionElement.length === 0) {
+				return;
+			}
+			var $icon = $actionElement.find('.icon');
+			if (showLoading) {
+				var $loadingIcon = $('<span class="icon icon-loading-small"></span>');
+				$icon.after($loadingIcon);
+				$icon.addClass('hidden');
+				$actionElement.addClass('disabled');
+			} else {
+				$actionElement.find('.icon-loading-small').remove();
+				$actionElement.find('.icon').removeClass('hidden');
+				$actionElement.removeClass('disabled');
+			}
+		},
+		isDisabled: function (itemName) {
+			var $actionElement = this.$el.find('.item-' + itemName);
+			return $actionElement.hasClass('disabled');
+		},
+		/**
+		 * Event handler whenever an action has been clicked within the menu
+		 *
+		 * @param {Object} event event object
+		 */
+		_onClickAction: function (event) {
+			var $target = $(event.currentTarget);
+			if (!$target.hasClass('menuitem')) {
+				$target = $target.closest('.menuitem');
+			}
+
+			OC.hideMenus();
+			this._context.multiSelectMenuClick(event, $target.data('action'));
+			return false;
+		}
+	});
+
+	OCA.Files.FileMultipleSelectionMenu = FileMultipleSelectionMenu;
+})(OC, OCA);
diff --git a/apps/files/js/filemultiselectmenu.js b/apps/files/js/filemultiselectmenu.js
index d50fe28eaceb9..5474fa8887323 100644
--- a/apps/files/js/filemultiselectmenu.js
+++ b/apps/files/js/filemultiselectmenu.js
@@ -11,7 +11,7 @@
 (function() {
 	var FileMultiSelectMenu = OC.Backbone.View.extend({
 		tagName: 'div',
-		className: 'filesSelectMenu popovermenu bubble menu-center',
+		className: 'filesSelectMenu popovermenu bubble menu-right',
 		_scopes: null,
 		initialize: function(menuItems) {
 			this._scopes = menuItems;
@@ -37,11 +37,6 @@
 		show: function(context) {
 			this._context = context;
 			this.$el.removeClass('hidden');
-			if (window.innerWidth < 480) {
-				this.$el.removeClass('menu-center').addClass('menu-right');
-			} else {
-				this.$el.removeClass('menu-right').addClass('menu-center');
-			}
 			OC.showMenu(null, this.$el);
 			return false;
 		},