Specify Plugin for behavior

When removing plugin bootstraps, this caused a Behavior not found error.
Fixed tests - refs #220
Set all Routing.prefixes to false in menus linking

So menus links don't keep current route in generated URL
Block weird image types from trying to imagecreatefrom*

i found an errror when i uploaded a favicon because it was trying to execute the function imagecreatefrom* with the mime type: image/vnd.microsoft.icon. So we set an array of valid suffixes and check against it.
Fix translated model caches not being flushed after saving translation.
Merge branch 'pr/220'
Merge branch 'pr/224'