HPCC-8817 More changes based on new request

The changes in this commit are based on the following suggestions.
1. Activity page should indicate which WU is running on an ECLagent
and which WU is 'really' running on a cluster. 2. The WUs running
on an ECLagent should be list after queued WUs on a cluster.

Signed-off-by: Kevin Wang <kevin.wang@lexisnexis.com>