FormKeyHandler now uses Control.FromChildHandle to determine whether the key message actually comes from inside the forms designer.
Replaced Hashtable with generic Dictionary. Removed unused local variable "ctl".
git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/branches/3.0@4948 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61