Listen for update event

Explorer should also look for update event, for updating devices add and remove
Bug fix

This used in wrong way
Explorer: refresh services w/o cache
+ expand people and/or devices if only one exist.
+ change color for services since we don't know yet if it's cached or not

Jira: WP-1292
Jira: WP-1293
Jira: WP-1294
Merge pull request #16 from cbotsikas/WP-1292-3-4

Explorer: refresh services w/o cache