Allow override of label name for saved metrics

[cooley-pe]

Is your feature request related to a problem? Please describe.
Being able to save metrics for a dataset is awesome! But sometimes I want to tweak the label for a particular context. e.g. user_count -> active_user_count.

Describe the solution you'd like
You can already override metric names for Simple or Custom SQL metrics. It would be great if you could do that for Saved metrics as well. Something like:

Describe alternatives you've considered
n/a

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. For admin, please label this issue .pinned to prevent stale bot from closing the issue.

[rusackas]

This seems like it's still an issue, but I'm closing this as stale since it's been silent for so long, and we're trying to steer toward a more actionable Issues backlog. If people are still concerned with this in current versions (currently 3.x) please open a new Issue or a PR to address the problem.