Feature/add icons to selectfilescene (#9)

* Create PokemonPartyIconWidget for displaying the party menu icon in the distribution event pokemon menu (untested)

* Integrate PokemonPartyIconWidget into the DistributionPokemonListScene

* Do some visual changes to the DistributionPokemonListScene

* Revert "Undo README.md changes because they were already shown in github after merging the feature branch"

This reverts commit dc8d9bb00d.

* Update docs

* Add file and folder icon to SelectFileScene

include/scenes/SelectFileScene.h

@@ -52,6 +52,8 @@ private:
     sprite_t* dialogWidgetBackgroundSprite_;
     sprite_t* uiArrowUpSprite_;
     sprite_t* uiArrowDownSprite_;
+    sprite_t* uiIconFile_;
+    sprite_t* uiIconDirectory_;
     bool bButtonPressed_;
 };