Add a CLI command that deletes an LDAP config

With this change LDAP configurations can be managed completely from
the command line.
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