Overview tab: reload data when switching back to it
A case:
- I set up a new DBLab instance
- configured data refresh
- switched to Overview, see that refresh is in process
- then switched to Logs to observe the process in detail
- I see that it's done
- Switch back to Overview -- and there I unexpectedly see that it's still in progress. It requires me to press "Reload" to see the actual state.
I think when we return to Overview, we just need to reload always, unconditionally.
cc @Adrinlol