Please describe the problem:
When "connect automatically" is enabled NM performs an automatic attempt only after start-up.

Since mobile broadband can be used while traveling a lost connection is not a rare event. And often is a pain to have to reconnect manually all the times.

Steps to reproduce:
1. Enable "Automatically connect" in "mobile broadband->edit"
2. Reboot
3. Plug usb modem in
4. Provoke a lost connection (for example, cover the modem with a metallic box)
5. Remove the box


Actual results:
After the modem is plugged in NM connects automatically.
After lost connection NM does not attempt a new connection

Expected results:
As long as the network is available NM should try to reconnect automatically

Does this happen every time?
Yes

Other information: