HPCC-8806 Rename Delete Query to Deactivate on Queries Active tab

On existing EclWatch > Browse Queries > Active Tab, there is a Delete
button. This fix renames that button (and related code) to be
'Deactivate'.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>
Merge pull request #4016 from wangkx/h8806

HPCC-8806 Rename Delete Query to Deactivate on Queries Active tab

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>