Monitor dashboard does not expand sections that have data on load

Summary

Collapsible sections in the monitor dashboard do not expand on page load even if the charts within the group have data.

Steps to reproduce

1. Create a project with autodevops.
2. Navigate to monitor dashboard in Operations > Metrics
3. Create a couple of metrics for the Custom metrics section to show up in the bottom.
4. Reload the page to notice that the Custom metrics section does not expand on load even if the charts within it has data.

What is the expected correct behavior?

Collapsible sections should be expanded by default on page load.