Use network-available property for connection status

Callback is less often called than network-changed.
3 jobs for network in 3 minutes and 38 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Test
passed #15271
run-appdata

00:00:06

passed #15270
run-tests

00:03:18

 
  Build
passed #15272
run-build

00:00:13