ios: Remove reference to UI views once game has started.

ios/RetroArch/RetroArch_iOS.h

@@ -10,6 +10,7 @@
 @interface RetroArch_iOS : UIResponder <UIApplicationDelegate>
 
 + (RetroArch_iOS*)get;
+- (void)game_has_started;
 
 @property (strong, nonatomic) UIWindow *window;
 @property (strong, nonatomic) NSString *module_path;

ios/RetroArch/RetroArch_iOS.m

@@ -59,6 +59,11 @@ extern uint32_t ios_current_touch_count ;
    [self.navigator pushViewController: [[settings_list alloc] init] animated:YES];
 }
 
+- (void)game_has_started
+{
+   self.navigator = nil;
+}
+
 - (void)processTouches:(NSArray*)touches
 {
    ios_current_touch_count = [touches count];

ios/RetroArch/game_view.m

@@ -42,6 +42,7 @@ void ios_load_game(const char* file_name)
          rarch_init_msg_queue();
          ra_initialized = TRUE;
 
+         [[RetroArch_iOS get ]game_has_started];
          [current_view performSelector:@selector(rarch_iterate:) withObject:nil afterDelay:0.2f];
       }
    }