Remove different URL for EE

This can now be achieved by setting `appstoreenabled` to `false` in config.php
Add isAppstoreEnabled instead of hijacking the URL
Adds 2 checkboxes at the top of userlist in the settings, to display/hide optional columns
This fixes #9367.
user mgmt: move 'Show storage location' and 'Show last log in' to settings area
Add missing 'personal' mount configuration option
Wizad: email attribute detection
remove Access as hard dependency, inject it instead
add unit test for mail detection
write log message, if original value was changed
undo falsely changed log file
trigger email detection by Wizard upon any user filter filter change. before it happenend only upon user automatic list filter creation, but not on manual editing
adjust static method vars as well
Merge pull request #10719 from owncloud/files-external-personal-undefined

Prevent undefined index error loading external storages
define min height/width for icon classes to make sure they show
Merge pull request #10724 from owncloud/min-size-for-icons

define min height/width for icon classes to make sure they show
Merge pull request #9684 from owncloud/fix-9367

Ability to show/hide last log in and storage location in user management
Merge pull request #9214 from owncloud/wizard_email_detection

LDAP: Wizard email attribute detection
retrieve local users, groups and group members in a sorted way
Remove insecure fallback random number generation
Don't register the call when rendering error pages