Migrate new app settings to AppFramework

Let's migrate those two new files.
rework getFileSize
small fix
ok; still some bugs that had to be fixed
implement localizations based on punic
adding unit tests for en_GB and en-GB - just to verify
bugfixes
small fix
fixing expected values for formatDate() unit tests
Update 3rdparty submodule
disable database migration unit tests for MSSQL
Merge pull request #11549 from owncloud/add-more-localizations-master

implement localizations based on punic
Setting moment locale based on user selection
Remove unreachable statement
Load avatar in header via PHP

* fix #7484
* use UID, css, and div instead of span
add avatardiv-shown class to bring back mobile style
Prevent division by zero

Potentially fixes https://github.com/owncloud/core/issues/11742
Merge pull request #11751 from owncloud/fix-unreachable-statement

Remove unreachable statement
Merge pull request #7749 from owncloud/load_avatar_header_via_php

Load avatar in header via PHP
[tx-robot] updated from transifex