Detect Wifi state with VPN

Problem:
Drained 4G databundle while in NC app : Auto-synch ON and Only-WIFI ON

Descr:
The Android client (latest version) does not detect Wifi/4G state correctly when using a VPN (OpenVPN), hence draining 4G databundle and Autosynch with WIFI-only set to ON

To prevent drain: manually switch every individual folder ON-OFF and clear Queue manually when switching networks.

Suggested workaround:
Add a single button to manual switch AutoSynch ON-OFF for all sub folders

Better:
Fix detecting Wifi state correctly.

Willing to test if needed