Fix going to wrong menu upon quit

The problem was, if you were in a time trial and quit, it wouldn't go
back to selecting your current time trial. But also if you were in a
custom level and quit, you would still be on the playerworlds menu.

The problem was twofold: first, I simply wasn't doing the custommode
check. But secondly, I couldn't use map.custommode directly, because
whenever you quit the game aggressively hardreset()s everything
immediately when you press ACTION.

There's probably a good reason for that aggressive hardreset(), so I
won't touch that hardreset() in any way. Instead, I had to introduce two
kludge variables wasintimetrial and wasincustommode to Game, and use
those to do the check proper.

desktop_version/src/Game.h

@@ -245,6 +245,10 @@ public:
 
     int creditposx, creditposy, creditposdelay;
 
+    //Menu kludge...
+    bool wasintimetrial;
+    bool wasincustommode;
+
 
     //Sine Wave Ninja Minigame
     bool swnmode;