Add group management to the public api

fix sharing update, add proper escaping

Do not load apps in console.php when an upgrade is due

This makes it still possible to update from the command line, but
disables custom commands from apps

Fix password reset in console command and lost password controller

Adding test which breaks because bit and/or enum datatypes are used

[OC 7] Fix preview animation on uploading

- set password correctly in lost password

Prevent cron.php to trigger apps updating

only commit in case a transaction is active

Simplify app navigation look

Fix remote share when remote server is installed at the root

simplify app navigation look, remove superfluous border as it is distinguished enough via background color

cc @Raydiation

adding special handling of checkPrecondition() for chunked upload

Remove uneeded strip_tags

Fix #8819 sorting

Correctly use groups parameter only when its not empty

Add language parameter to public API for getL10N()

use the minimum of configured session_livetime and session.gc_maxlifetime for session hearbeat interval calculation

perm -> permissions

Fix #9756

Fix username for subadmins and only send subadmin groups