2.80: Pie menus and Quick Favorite menu - conflict? When I have the 'UI Pie Menu Official' activated I cannot open the Quick Favorites Menu when pressing q. All I get is another pie menu with possible view port option (top, front, left etc.)

Any idea?
Pie Menus are enabled by default in blender 2.8, so you no longer need to enable the addon.  So now the q key will work as quick favorites.  

But how do you get the view pie menu that the addon previously provided with key q?  Well, that's now the backtick key (`).  You can see all the pie menu key mappings under the user_preferences->keymap and filtering on pie: