don't allow to share single files with delete permissions, user should only be possible to unshare a single file but never to delete it

Verify that we have a valid storage in View->getPath

Add Turkish to common languages

[encryption] use oc preferences

Improve share settings

Add method to get users by their preference

fix typo in var name

fix size and unbold empty content message

Revert "make reshare settings foldable"

This reverts commit c01f196f.

Conflicts:
	settings/templates/admin.php