The app is now enabled by default

Otherwise dropping something somewhere can by mistake upload the file and make it available

AppManager has a dependency on Nc being installed

Also adds support for having custom login backgrounds

[Master] upstream sync

Makes select2 in settings/admin look the same like everywhere else

Fix search result link for file results outside default list

Show error message when posting an invalid comment

Replace occurence of "ownCloud" by "Nextcloud"

When clicking on a folder result in the search result list, the result
box for "results in another folder" must disappear.

When outside the "All files" list, the search result link must properly
redirect to the "All files" list.

Add option to `occ files_external:list` to show all configured mounts

When an internal server error occurs while creating or updating a
comment, display a proper error notification in the UI.

Don't reload page in case of auth errors during setup checks

Fix trashed file name corruption when rerendering trashbin list

changes emptycontent icon to drag-accept on file-drag

If an error occurs during setup checks, do not let the global ajax
error handler reload the page.

The trashbin code does some gymnastics with the file data at render
time. This fix makes sure that the modifications done on the file data
are only local to the rendering code and doesn't affect the actual file
data from the file list.

de language files changed to Nextcloud

Init the headers in iedavclient.js

Rollback version must also adjust cached size

Hide more default options in occ files_external:list

Add timeouts to make the UI usable again when a remote share is unrea…