Frontent dev env (#247)

* Added frontend development files/environment

* More items-categories related removals

* Improvements in pages templates (inc. static pages)

* Improvements in video player

* Added empty home page message + cta

* Updates in media, playlist and management pages

* Improvements in material icons font loading

* Replaced media & playlists links in frontend dev-env

* frontend package version update

* chnaged frontend dev url port

* static files update

* Changed default position of theme switcher

* enabled frontend docker container

frontend/src/static/js/utils/actions/PlaylistPageActions.js

@@ -0,0 +1,41 @@
+import Dispatcher from '../dispatcher.js';
+
+export function loadPlaylistData() {
+  Dispatcher.dispatch({
+    type: 'LOAD_PLAYLIST_DATA',
+  });
+}
+
+export function toggleSave() {
+  Dispatcher.dispatch({
+    type: 'TOGGLE_SAVE',
+  });
+}
+
+export function updatePlaylist(playlist_data) {
+  Dispatcher.dispatch({
+    type: 'UPDATE_PLAYLIST',
+    playlist_data,
+  });
+}
+
+export function removePlaylist() {
+  Dispatcher.dispatch({
+    type: 'REMOVE_PLAYLIST',
+  });
+}
+
+export function removedMediaFromPlaylist(media_id, playlist_id) {
+  Dispatcher.dispatch({
+    type: 'MEDIA_REMOVED_FROM_PLAYLIST',
+    media_id,
+    playlist_id,
+  });
+}
+
+export function reorderedMediaInPlaylist(newMediaData) {
+  Dispatcher.dispatch({
+    type: 'PLAYLIST_MEDIA_REORDERED',
+    playlist_media: newMediaData,
+  });
+}