UX Overhaul (#305)

* Fix bgm checking bug

* Converted install and menu options into button menus rather than combos

* Fix sort order

* Various touch screen changes so that most functions can be done via touch

 * Dim theme list when navigating menus

* Translation framework implemented

* bug when no themes loaded fixed

* Fix theme preview regression introduced in d037691

include/conversion.h

@@ -4,6 +4,6 @@
 #include "common.h"
 
 size_t bin_to_abgr(char ** bufp, size_t size);
-size_t png_to_abgr(char ** bufp, size_t size);
+size_t png_to_abgr(char ** bufp, size_t size, u32 *height);
 
-#endif
+#endif