adjust autocomplete behavior for sharing menu
make skeleton compatible with objectstore

suspend encryption proxy when copying skeleton
throw exception in writeBack, the returned boolean is checked nowhere
make tests compatible with hook based skeleton generation
Merge pull request #11644 from owncloud/tune-share-autocomplete

adjust autocomplete behavior for sharing menu
Refer to relative path instead of absolute path

There is no need to refer to the absolute path here if we can use the relative one.

Conflicts:
	lib/private/templatelayout.php
Add unit tests for convertToRelativePath
Add "$_SERVER['REQUEST_URI']" to fix the unit tests

Let's hope that works