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
Make files non executable

There is not much sense in having these files marked executable, we should avoid that.
Merge pull request #11754 from owncloud/fix-division-null

Prevent division by zero
Merge pull request #11758 from owncloud/fix-permissions

Make files non executable
Use function outside of loop

Otherwise the function is executed n times which is a lot of overhead