Perf Discovery Links to tasks do not select currently selected metric

Perf discovery now supports displaying expanded metrics data. The task and test links however still point to the default metrics when used.

User Acceptance Criteria:

• When clicking on a task link in Perf Discovery, the resulting page loaded will have the performance chart with the corresponding metric selected in the drop-down and displayed on the chart.
• When clicking on a test link in Perf Discovery, the resulting page loaded will have the performance chart with the corresponding metric selected in the drop-down and displayed on the chart.
• When clicking on a build link in Perf Discovery, the resulting page loaded will not preserve the corresponding metric.