Fixed clicking on the "Home" breadcrumb in the trash app

Clicking on the "home" breadcrumb now correctly brings the user back to
the files app.

'Update to' is shown when there is no update

Don't load the apps when we need to upgrade

Fix double not in newfile/newfolder language.

Fixed user dir existence check when creating new user

Added syntax help for autotest.sh

local user backend shall search for both username and displayname, fixes...

Fix broken users page when a username consists of digits only, fixes #55...

The check was done too later. It turns out that createUser() had already
created the dir, which caused the warning message to be shown every
time.

Fixes for quota stream fseek

See #4716

- Added missing return statement
- Added missing support for SEEK_END
- Fixes #5524

autotest.sh now checks for the validity of the db config name argument.
If the db config name is not known, it show syntax info.

This should save some time to people to understand how to use this
script. Before this fix, an invalid argument would return a big HTML
page in the output.

make sure the shared ldap connection is rebound to the configured user after being used for password checking.

Ldap fixes

Changed update message to be more instructive

Fix br tags

Improve english messages

Remove WebDAV redirect from the root path

introducing new dav property {xmlns:oc="http://owncloud.org/ns}id

Fix leftcontent/right content, fixes contacts app

- remove property only if present

Tasks app layout was broken since the controls bar is higher now.
This change should hopefully fix other apps using the same layout.