Mugshot has a hard dependency on AccountsService

[Sean Davis]

Mugshot seems to depend on AccountsService. This functionality should be optional.

corsac@scapa: mugshot
Traceback (most recent call last):
  File "/usr/bin/mugshot", line 35, in <module>
    mugshot.main()
  File "/usr/lib/python3/dist-packages/mugshot/__init__.py", line 45, in main
    window = MugshotWindow.MugshotWindow()
  File "/usr/lib/python3/dist-packages/mugshot_lib/Window.py", line 50, in __new__
    new_object.finish_initializing(builder)
  File "/usr/lib/python3/dist-packages/mugshot/MugshotWindow.py", line 217, in finish_initializing
    self.init_user_details()
  File "/usr/lib/python3/dist-packages/mugshot/MugshotWindow.py", line 225, in init_user_details
    image = self.accounts_service_get_user_image()
  File "/usr/lib/python3/dist-packages/mugshot/MugshotWindow.py", line 442, in accounts_service_get_user_image
    None)
gi._glib.GError: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.freedesktop.Accounts was not provided by any .service files
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Looking at the stacktrace, it seems to require AccountService, which is
not installed here (I don't want it), but since the package doesn't
Depends on it (nor Recommends it), I assume there's a bug somewhere.