Aborting query can hang / Aborting a query should return control to query editor immediately

[cody-somerville]

Aborting a query can often seemingly hang or take an unexpectedly long time to return control to the editor to permit the user to continue. Aborting a query should return control to the query editor immediately. If there is continued value in having the behavior introduced via #43, it could instead be provided via a mechanism that permits the user to resume editing such as toaster notification, docked progress bar, etc.