fix(header): width regression fixed

Signed-off-by: Eduardo Morales <emoral435@gmail.com>

Author: emoral435

src/components/NcHeaderMenu/NcHeaderMenu.vue

@@ -347,8 +347,8 @@ $externalMargin: 8px;
 	width: var(--header-height);
 	height: var(--header-height);
 
-	&__trigger {
-		width: var(--header-height);
+	#{&}__trigger {
+		width: var(--header-height) !important;
 		height: var(--header-height);
 		opacity: .85;