HPCC-9034 Add Package Maps GUI to EclWatch

This fix adds Package Maps link to EclWatch navigation section. From this
link, EclWatch displays a list of all Package Maps and multiple controls
for Package Maps. The list may be filtered using target, process, etc.
The controls may be used to add new Package Maps, activate/deactivate
Package Maps, and delete Package Maps. Details of each Package Map may be
viewed using Open button.

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