In some situations, a group share is created before a user share, and
the recipient renamed the received share before the latter is created.
In this situation, the "file_target" was already modified and the second
created share must align to the already renamed share.

To achieve this, the MountProvider now groups only by "item_source"
value and sorts by share time. This makes it so that the least recent
share is selected as super-share and its "file_target" value is then
adjusted in all grouped shares.

This fixes the issue where this situation would have different
"file_target" values resulting in two shared folders appearing instead
of one.

The repair step was a bit overeager to skip repairing so it missed the
case where a group share exists without subshares but with an
additional direct user share.

Fixes #24575

Note that this is a very limited solution and eventually we want smarter
merging!

Apply black app icon style to newly installed app icons

Do not allow to delete/update group shares as a group member

add invalidateOldTokens to IProvider interface

Shake the login fields if password is wrong

fix missing semicolon to fix themed logo on log in page

slight animation for the sidebar for better feedback what happens

Fix OCS CSRF

Validate the input of the theming options

Occ rebrand to nextcloud

remove extra file size padding to fix action menu position

Close session fast when doing a test to prevent blocking the next requests

typo

To be dealt with later