Call hardreset() when returning to menu from editor

During testing, I made a cursed level that set the flash timer to
precisely 1,000,000 frames. It turns out that if I activated the timer
in playtesting, exited playtesting, and exited the editor without ever
re-entering playtesting, the timer still kept going. So to prevent being
able to do that, we should hardreset() when exiting the editor.

desktop_version/src/editor.cpp

@@ -3451,6 +3451,7 @@ void editorlogic()
         map.nexttowercolour();
         map.colstate = 10;
         game.gamestate = TITLEMODE;
+        script.hardreset();
         graphics.fademode = 4;
         music.haltdasmusik();
         music.play(6);