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/helpers/formatManagementTableDate.js

@@ -0,0 +1,15 @@
+import { months as monthList } from '../constants/';
+
+export function formatManagementTableDate(date) {
+  const day = date.getDate();
+  const month = monthList[date.getMonth()].substring(0, 3);
+  const year = date.getFullYear();
+  const hours = date.getHours();
+  const minutes = date.getMinutes();
+  const seconds = date.getSeconds();
+  let ret = month + ' ' + day + ', ' + year;
+  ret += ' ' + (hours < 10 ? '0' : '') + hours;
+  ret += ':' + (minutes < 10 ? '0' : '') + minutes;
+  ret += ':' + (seconds < 10 ? '0' : '') + seconds;
+  return ret;
+}