Fix cheat handling

This adds keydown handler for chat, map, and diary displays.
Additionally, this can be used to handle malicious chat input without a
delay by modifying the associated compile

SQF/dayz_code/Configs/RscDisplay/RscMap.hpp

@@ -1,5 +1,6 @@
 class RscDisplayMainMap
 {
+	onKeyDown = "if (!isNil 'DZE_FilterCheats') then {_this call DZE_FilterCheats;}; false";
 	class controls
 	{
 		delete CA_MainBackground;