CS-4563: User editing in back-end allows for cross-site scripting

Cast user id parameter to int.
Cast language id parameter to int and fixes error on not found language.
Merge branch 'zplus' of https://github.com/thnkloud9/Newscoop into zplus
MOTM-439: Allow bloggers to remove autopublish events

Add autopublish remove to blogger service action whitelist.
MOTM-504: Subscribing to topic newsletters not working correctly
added custom code in ListApi because I had trouble with zend form validator.  the better fix would be to add
a hidden form field for the Themen array with a value of "" that gets posted to the form and forces the Themen groups
list to be overwritten