[FEATURE] Add a signal to extend the ProxyBuilding (Revision 3)

This change adds a new Signal to the CoreCommandController
to do additional proxyBuilding.

releases: master
Change-Id: I840eac9b77fb5c20f6e80e1b29caf059c3485d62
Revision-Id: 3cd6f69c42bfcb5cecfd72bc566c00cfd732f6c0