Switched imgui over to SDL implementation, dialog input works.

REDALERT/CONQUER.CPP

@@ -2539,6 +2539,8 @@ void Go_Editor(bool flag)
 	*/
 	if (flag) {
 		AudMix_SetMusicState(false); // jmarshall: disable music if we are in editor mode
+		Hide_Mouse();
+		ShowCursor(TRUE);
 		Debug_Map = true;
 		Debug_Unshroud = true;
 
@@ -2570,6 +2572,9 @@ void Go_Editor(bool flag)
 
 	} else {
 		AudMix_SetMusicState(true); // jmarshall: enable music if we are going back into editor mode.
+		Show_Mouse();
+		ShowCursor(FALSE);
+
 		/*
 		**	Go into normal game mode
 		*/