[player] Fix presentation complete when reloading stored unit states

...input-group-element/input-group-element.component.spec.ts

...group-element/interactive-group-element.component.spec.ts

...roup-element/media-player-group-element.component.spec.ts

...s/text-group-element/text-group-element.component.spec.ts

...-group-element/text-input-group-element.component.spec.ts

...mponents/layouts/pages-layout/pages-layout.component.html

projects/player/src/app/components/unit/unit.component.ts

...ects/player/src/app/directives/element-group.directive.ts

projects/player/src/app/directives/unit-state.directive.ts

projects/player/src/app/services/media-player.service.ts

projects/player/src/app/services/unit-state.service.spec.ts

projects/player/src/app/services/unit-state.service.ts