Add new view for monitoring indicators

First go for now.  Next step is to edit the current_result fields
Add current_result numbers to fixture

So the indicator/output bar graphs have some data to work with
Refactor target_percent calculation

Including adding a _calculate_weighted_target_percent() method - for
impact and outcome.
Use averaged numbers for barcharts all the way up
Alternate the colors for the outputs

- first is ok -> green
- last is warning -> yellow
- the rest are danger -> red