feature request: better feedback for running queries

[herbertpimentel]

When we write wrong queries, the wagon does not give any feedback to the user that this query is running until you receive the error message. I belive that will be nice the behavior for any query change to immediatly adding a "card with a loader" and simple change the loader for the content when receive the results of the query.

This is almost what is done when we running a nice query, the "card" shows us a "streaming..." that is awesome.

This is will also help to avoid submit multiple times the same query before receive the response.

[herbertpimentel]

I saw later that wagon does exactly what I requested, but I may didn't realize that because sometimes the UI freezes.

Anyway maybe is a good idea prevent submit multiple times the same query before receive the response.