SwitchNextZone() call in the loop_rounds instead

Since there's broken zones, we need to do this otherwise we may stay in a low difficulty zone, especially if the planet auto switch is disabled.  
We can still have an issue if we join the planet very early. Hopefully Valve will fix this.

idle.js

@@ -408,7 +408,7 @@ var INJECT_end_round = function(attempt_no) {
 				// Restart the round if we have that variable set
 				if(loop_rounds) {
 					current_game_id = undefined;
-					INJECT_start_round(target_zone, access_token)
+					SwitchNextZone();
 				}
 			}
 		},