metrics visualization initial module implementation

- establish metrics module

This PR is primarily for the initial implementation of the metrics arc module but also contains some enhancements for the PID selector which is shared by the profiler.

the PID selector changes are mostly arround remembering references to previous pm servers for convenience

Fixes #578 
Fixes #594 
Fixes #479 
Fixes #482 
Fixes #502

/to @bajtos @anthonyettinger 
again, this code has also undergone considerable cleanup.  The only thing that is repeated is the call to ChartConfigService.getChartDataConfig with each of the three chart types.

As for the $timeout wrappers, I just added them to try and lighten up the chart rendering processing by making it async and added different numbers just to make the front end rendering a little more interesting