wi-fi: Move controls out of headerbar

Enable switch and popover taken out of header bar. Follow order of Network mockups for rows. Wifi hotspot left as option until it get's its own panel in full network panel update.

Fixes #2413 (closed)

Before:

After:

clicking rows brings up current dialogs.

Follows redesign here: https://gitlab.gnome.org/Teams/Design/settings-mockups/-/blob/master/network/wifi-settings.png