hide mesh device icon when inactive

[dsd]

Based on #2086 and a mailing list discussion, we should hide the mesh device icon when the connection is inactive.

[tomeu]

+ del self._device_view
+ self._device_view = None

Is that del really needed?

+ logging.error('Error getting the device properties: %s', err)

May be better to raise an exception so we have the traceback.

+ if state >= network.DEVICE_STATE_PREPARE \
+ and state <= network.DEVICE_STATE_ACTIVATED:

I personally think we should treat that as an enum and don't assume anything about the integer values of the enum values, but I see we are already doing it somewhere else.

Please push when you think these concerns have been addressed.

[dsd]

The "del" is indeed pointless, I removed it but there are other offenders in the same file.

I left the logging message the same. A traceback would not be interesting as it comes straight from dbus. There are many other "offenders" in this code too.

Changed the state thing and pushed, thanks.