* On Kobo, kill WiFi on startup if we detect an inconsistent state...
Untested, not terribly pretty.
The other solution is to slow down the Wi-Fi meny by doing the same
check for the "Wi-Fi connection" checkbox as in the later wifi_status
one...
* Don't enable auto_restore_wifi by default
It's liable to silently murder batteries for no good reason, given that
we prompt to enable WiFi by default when needed, and we otherwise have
no actual need to keep WiFi on in the background.
re #2215 (in particular, this directly contradicts @houqp in
https://github.com/koreader/koreader/pull/2215#discussion_r74696133 ;)).