Add back to portal and background color options

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

...pp/admin/instance/components/instance-form.component.html

.../app/admin/instance/components/instance-form.component.ts

...in/instance/containers/edit-instance-group.component.html

...dmin/instance/containers/edit-instance-group.component.ts

...dmin/instance/containers/instance-group-list.component.ts

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

client/src/app/metamodel/models/instance.model.ts

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

client/src/app/shared/components/navbar.component.html

conf-dev/create-db.sh

server/doctrine-proxy/__CG__AppEntityInstance.php

server/src/Action/InstanceAction.php

server/src/Action/InstanceListAction.php

server/src/Entity/Instance.php