MooTools 1.6 compatibility

I noticed the following issues when checking the MooTools 1.6 compatibility:

• page settings can't be opened: undefined is not iterable in Panel.js:1296
  
• log-files can't be downloaded (not sure if that's related to MooTools) (not related to MooTools)
• users can't be deactivated with the slider in the User manager table overview (not related to MooTools)
• editing calendar events causes errors in the console: undefined is not iterable in /bin/QUI/init.js:123
• opening a menu (e.g. Administration), clicking and holding on an item in the list and then dragging it throws an error: Cannot read property 'get' of undefined in mootools-more.js:213
• dragging media items (e.g. an image) throws the same error as above