fix: use print_escaped for radio button "checked"

use of p() results in escaped HTML code: checked=&quot;checked&quot;
where it should be: checked="checked"
Reset time of last update feed polling
Propagate unencrypted_size up to the file cache root
Return unencrypted_size of folder when queried

This fixes the "used space" to be based on the unencrypted size, not
encrypted size, to be consistent with how quota/space is handled when
encryption is enabled
Fixed log warning when deleting a single file
only initialise upload dropZone if public upload is allowed
we first shall check if the current session is valid - otherwise the session-id will be regenerated on login via basic auth
fixing ident
Merge pull request #7624 from owncloud/enc-encryptedusedspacefix

[master] Fixed used space to be based on unencrypted size
Merge pull request #7631 from ichEben/master

 [6.0.2RC1] Share folder as link -- no public upload, drag&drop still works #7422
we need the file_source to delete a share successfully
Merge pull request #7629 from owncloud/files-allfileswarningtypo

Fixed log warning when deleting a single file
Merge pull request #7632 from owncloud/fix-7582-master

we first shall check if the current session is valid - otherwise the ses...
if file is not in db, fall back to restore file to the users root
only enable previews if the encryption is disabled
get trash size from file cache
fix mimetype detection, introduce fake etag to identify preview images
Merge pull request #7398 from owncloud/trash_dont_rely_on_db

[trash] fall back if file is not in db
Merge pull request #7646 from owncloud/fix_ocs_api_unshare

we need the file_source to delete a share successfully
Merge pull request #7600 from ideaship/fix_escaped_html

fix: use print_escaped for radio button "checked"