title: Per instance widget preferences VS app preferences
body: <p>My app is currently using a subclass of PreferencesActivity for its preferences.
  I am in the process of adding widgets, where each instance has its own preferences (I also offer multiple widget sizes, which means multiple subclasses of AppWidgetProvider).</p>
  
  <p>The widgets and the app share most of their preferences, the widget actually supporting a few items less.</p>
  
  <p>In the process of writing the widget configurator activity, I am realizing that I need to access a preferences layout which does not exist.
  As I understand it, is not possible to access the PreferencesActivity layout in the configurator activity. Does this means that I must create a sepecific preferences layout for the configurator activity ? Do you have any tips on optimizing the overlap between app and widget preferences ?</p>