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/components/MediaListHeader.tsx

@@ -0,0 +1,27 @@
+import React from 'react';
+
+interface MediaListHeaderProps {
+  title?: string;
+  viewAllLink?: string;
+  viewAllText?: string;
+  className?: string;
+  style?: { [key: string]: any };
+}
+
+export const MediaListHeader: React.FC<MediaListHeaderProps> = (props) => {
+  const viewAllText = props.viewAllText || 'VIEW ALL';
+  return (
+    <div className={(props.className ? props.className + ' ' : '') + 'media-list-header'} style={props.style}>
+      <h2>{props.title}</h2>
+      {props.viewAllLink ? (
+        <h3>
+          {' '}
+          <a href={props.viewAllLink} title={viewAllText}>
+            {' '}
+            {viewAllText || props.viewAllLink}{' '}
+          </a>{' '}
+        </h3>
+      ) : null}
+    </div>
+  );
+};