#12 Add Cancel Running Query button

[opensource fan]

This is the best sqlite desktop software on the market (and that includes commercial ones). I have been using it for many years.

Please add a button to cancel a long running query. I have a big sqlite database and when I run a query and the query is taking very long, it would be helpful if there is a button to cancel the running query. Also, the current query should run in a separate thread so that the application does not appear to be frozen when running very long queries.