Add wifi and wwan quicksettings

This brings in initial quick settings from !451 (closed) and !452 (closed). In contrast to that MR we don't toggle anything but rather go to the corresponding panel in g-c-c. This for one keeps us out of any rfkill discussions and also is more useful for e.g. wifi since essid selection seems way more common than toggling radio (once this is in initially we can discuss this toggle by toggle, i guess).

This also gets rid of the 'self-hiding' of widgets so their containers have proper control and so we can get rid of the rather odd show-always property and name the settings consistently.

Closes: #312 (closed), #329 (closed)