Editor: use a button with a popupMenu to show/hide a layer in map editor.
Editor: add a popupMenu in map settings view to show/hide entity types.
Editor: add the directory name in resource types.
Editor: new parameter to set a default path in new resource dialog.
Editor: change the quest tree view to keep the file hierarchy.
Merge branch 'master' of https://github.com/Christopho/solarus