Query cancel causes prior query to be deleted

STEPS FOR TESTING 1. Run a query to completion. 2. Make note of the <query_master_id>. 3. Verify the query appears correctly in previous queries. 4. Run a second query, only click on the cancel button once the query starts running. 5. Make note of the <query_master_id> for the cancelled query. 6. Go to Previous Queries and verify the first query still appears in the list of queries. 7. Open the XML messages in Previous Queries. 7. Find the 'deleteQueryMasterId' message. 8. Verify the <query_master_id> for the cancelled query is sent in the request message. +++++++++++++++++++++++++++ Tested latest change and cancel queries is now working correctly.