added action button ability to lock or unlock them in place

code/datums/action.dm

@@ -43,6 +43,7 @@
 	M.actions += src
 	if(M.client)
 		M.client.screen += button
+		button.locked = TRUE
 	M.update_action_buttons()
 
 /datum/action/proc/Remove(mob/M)
@@ -52,6 +53,7 @@
 	if(M.client)
 		M.client.screen -= button
 	button.moved = FALSE //so the button appears in its normal position when given to another owner.
+	button.locked = FALSE
 	M.actions -= src
 	M.update_action_buttons()