Upgrade Angular to v16 (#431)

* Apply angular and cli upgrade to v16 -- ng update changes only

* Apply ng update @angular/material@16 @angular/cdk@16 @angular/cdk-experimental@16

* Update other dependent packages to v16: ng update @angular-builders/custom-webpack@16 ngx-cookie-service@16 angular-gridster2@16

* Fix toolbar appearance

* Migrate to functional guards in routing module

Author: omkar-ethz