* Add get-version methods to all controllers
* Add simple page footer with copyright and version
* Add AC and ANR xApp services
* Rename signal service to E2 Manager service
* Use XappMgrService to replace ControlService and CatalogService
* Apply mat-table to control and catalog
* Add get-version methods to all controllers
* Add simple page footer with copyright and version
* Add AC and ANR xApp services
* Rename signal service to E2 Manager service
* Use XappMgrService to replace ControlService and CatalogService
* Apply mat-table to control and catalog