Add distinct navbars (admin, portal, instance)

client/src/app/admin/admin.component.html

client/src/app/admin/admin.component.ts

client/src/app/admin/admin.module.ts

client/src/app/admin/components/admin-navbar.component.html

client/src/app/admin/components/admin-navbar.component.scss

client/src/app/admin/components/admin-navbar.component.ts

client/src/app/admin/components/index.ts

client/src/app/instance/components/index.ts

...rc/app/instance/components/instance-navbar.component.html

...rc/app/instance/components/instance-navbar.component.scss

.../src/app/instance/components/instance-navbar.component.ts

client/src/app/instance/instance.component.html

client/src/app/instance/instance.component.ts

client/src/app/instance/instance.module.ts

client/src/app/portal/components/index.ts

...nt/src/app/portal/components/portal-navbar.component.html

...nt/src/app/portal/components/portal-navbar.component.scss

client/src/app/portal/components/portal-navbar.component.ts

client/src/app/portal/containers/portal-home.component.html

client/src/app/portal/containers/portal-home.component.ts