Deadlock on bad slow requests.

[akvlad]

1. Open gigapi ui
2. Run a bad request on a huge amount of data.
3. The request will go to the non-ending processing.
4. Press F5 to restart page to run another request.

AR: The same request starts running automatically again.
ER: There should be a way out of the deadlock.

5. Try changing the request.

AR: The unknown blue notification with no visible content pops up. The editor doesn't allow any changes.

ER1: The notification content should definitely be visible.
ER2: I've seen no database viewers where editor is blocked during query processing. The behavior provides an impression of system being non-responsive.

[caioricciuti]

Also planning a "cancel query" 🚀

[lmangani]

We indeed need to be sure we don't auto-execute queries on reloads