Proposed enhancement to Issue #94 on the select button "minus" (#104)

* Added select graphic and code to replace minus

* Actually added the select PNG to romfs

include/common.h

@@ -63,10 +63,11 @@ enum TextureID {
     TEXTURE_BATTERY_CHARGE,
     TEXTURE_QR,
     TEXTURE_PREVIEW,
+    TEXTURE_SELECT_BUTTON, //Add the new select texture
 
     TEXTURE_ICON, // always the last
 };
 
 void exit_function(void);
 
-#endif
+#endif