insights: aggregations reset the ui mode to sidebar when drilling into chart
Created by: chwarwick
Updates the bar click logic to reset the current UI mode to Sidebar if it isn't already. I avoided the pings because this is not a user taken.
resolves https://github.com/sourcegraph/sourcegraph/issues/41447
Test plan
Expand the aggregation, then click a bar and see the aggregations return to the sidebar with updated search results.
App preview:
Check out the client app preview documentation to learn more.
