Separate monitoring dashboard header to another component

Goal

Our dashboard component is becoming complex.

As part of our effort to keep components composable, we should consider separating the header to a separate component that can trigger events directly in the store.

Original Discussion

The following discussion from !29902 (merged) should be addressed:

• @tristan.read started a discussion: (+2 comments)

  @mrincon I wonder if this could be a separate component. I'm concerned that the dashboard.vue file is getting rather large.