HPCC-9136 Remove Roxie Queries options from ECLWatch UI

A 'Queries' section has been added to ECLWatch navigation. Old 'Roxie
Queries' section should be removed. This fix also removes the 'ShowQuery'
from logical file's drop down menu since the 'ShowQuery' for a file has
not been implemented yet.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>