[stable27] Fix smart picker integration of new Vue based file picker

[susnux]

• Resolves: FilePicker: Display issues when used via Smart Picker nextcloud-libraries/nextcloud-dialogs#887

Summary

The reference files picker needs to be migrated to the new files picker, as currently the dialog is broken on close.

TODO

• This fixes the issue but introduces a visual issue with the dialog action which is resolved with the next beta of @nextcloud/dialogs.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[AndyScherzinger]

Thanks 👍