Describe the problem

Clicking anywhere on the screen after dragging-to-zoom in DB Console's custom chart causes your time scale to keep zooming further. This makes the custom chart unusable when you're investigating an issue around a particular time scale. It interrupts workflow

To Reproduce

1. Go to the custom chart page
2. Add a metric, for example sql.service.latency-p99.999
3. Drag to zoom on a smaller time scale within the graph
4. Here's the issue: after dragging-to-zoom, no matter where you click on the screen it will cause further zooming around the area you dragged.
5. This is not only distracting, but it interrupts a user's workflow when they are attempting to investigate a spike at a particular time

Environment

• Testing on v21.1.11 on roachprod
• Happens on a small (4 node) and large (100+ node) cluster

Epic CRDB-8038