Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/hydrapaper/wallpaper_flowbox_item.py", line 100, in on_rightclick
    self.popover.popup()
  File "/usr/lib/python3/dist-packages/hydrapaper/wallpaper_flowbox_item.py", line 29, in popup
    ).get_parent().is_favorites or
                   ^^^^^^^^^^^^
AttributeError: 'ViewStack' object has no attribute 'is_favorites'