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

fix files multiselect bar now that the app list is gone

Remove legacy routing code

Don't update the mtime if the storage mtime hasn't changed

Fixed quota wrapper to return the value from flock()

Dont overwrite OCA.Sharing

table files_trashsizes was still used in some locations -> removed

The getfile routing code was absolutely legacy and not needed anymore. Additionally \OC::$REQUESTEDAPP was never set to the actually accessed application.

This commit removes the legacy routing code and ensures that $REQUESTEDAPP is always set so that other applications (e.g. the firewall or a two-factor authentication) can intercept the currently accessed app.

Testplan:
[x] Installation works
[x] Login with DB works
[x] Logout works
[x] Login with alternate backend works (tested with user_webdavauth)
[x] Other apps are accessible
[x] Redirect on login works (e.g. index.php?redirect_url=%2Fcore%2Findex.php%2Fsettings%2Fapps%3Finstalled)
[x] Personal settings are accessible
[x] Admin settings are accessible
[x] Sharing files works
[x] DAV works
[x] OC::$REQUESTEDAPP contains the requested application and can be intercepted by other applications

Use the permissions exposed by ownCloud for webdav external storages

use slide toggle for files app