Fix delta rendering glitch when going to options from new Esc menu

Well this is a bit annoying. I can call graphics.updatetowerbackground()
just fine, but I have to get at the title color update routine inside
titlelogic(), which is hard-baked in. So I have to pull that code
outside of the function, export it in the header, and then call it when
I transition to TITLEMODE.

desktop_version/src/Logic.h

@@ -8,6 +8,8 @@
 #include "Music.h"
 #include "Map.h"
 
+void titleupdatetextcol();
+
 void titlelogic();
 
 void maplogic();