Revert "Remove unused add_network_to_project() method"
Revert "Remove unused add_network_to_project() method"

This reverts commit d8e39cb775a872c46d067bee8febc40dee799369.

Change-Id: I22f0692814ff029b4960ab32cbee63bbf4922106

n0ano/gantt,n0ano/gantt