feat: re-work media source presentation

src/Pages/ShowEpisodeDetails.vue

src/components/calendar/ACalendarDayEntry.vue

src/components/episode/AEpisodeTableRow.vue

src/components/media/AMediaEditor.vue

src/components/media/AMediaPreview.vue

src/components/media/AMediaSourceEditor.vue

src/components/media/AMediaSources.vue

src/components/media/AMediaStateCheck.vue

src/components/shows/TimeSlotList.vue

src/components/shows/TimeSlotRow.vue

src/i18n/de.js

src/i18n/en.js

src/stores/episodes.ts

src/stores/media-sources.ts

src/stores/media.ts

src/stores/shows.ts

src/stores/timeslots.ts