only show connection checks results if there are errors, fix #11476

tearDown the file system before reinitializing 

do not show update notification on mobile, fix overlapping of header menus

highlight active user menu entry

Use individual timers for separate config rows

Recreate trashbin folder after full deletion

sidebar fixes

Make the link to issue template bold

Makes it easier to see the issue template link. And hopefully more we don't have to tell everybody that much that they should use it.

Log forbidden in debug level

Update sabre-2.1.3 thirdparty submodule

Group sharing activities by user/group and file respectively

Deduplicate external manager tests

Files thumbnail fix

* Only use public interfaces
  - Injected IPreview
* Added unit tests

Fix failing master unit tests

OCS API should return fancy OC url

Add `getNonExistingName()` to the node api

consolidate all admin warnings and notices into one section

correctly align file list summary when the list has the favorite feature

round width and height when cropping avatar

"Integrity constraint violation" when sharing the same item twice with the same user

Don't use hardcoded date and time

Remove range header exception for encryption