Fixes #3902 : allow double click in image picker

[eszkadev]

Steps to reproduce the behavior:

1. Open any document in Nextcloud Office
2. Insert -> Insert Image... (it shows NC file picker)
3. Double click on any entry (or even anywhere in the dialog?)
4. Click button 'Insert Image'

Result: no image inserted, in the browser console we can see error:
Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'path')

[elzody]

/backport to stable30

[elzody]

/backport to stable29

[github-actions]

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