improvements to the mobile compass: can be used in modes other than MOVE (long click to switch mode to MOVE anyway); better arrow scaling

control.cpp

@@ -878,8 +878,8 @@ void gmodekeys(int sym, int uni) {
   }
 
 bool haveMobileCompass() {
-#if CAP_MOBILE
-  if(andmode || useRangedOrb) return false;
+#if ISMOBILE
+  if(longclick) return false;
 #else
   if(forcetarget) return false;
 #endif