feature OMS-229 :
* Every gauge checks(not hub for now) check every 10 seconds if its data has been updated or not. So if metrics is turned of or other data error then gauges are grayed out. If metrics is turned on or data is received, then goes back to normal.
Added button that re-registers all gauges (OMS-229)
Merge pull request #94 from opennode/OMS-229

Oms 229