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/formatViewsNumber.js

@@ -0,0 +1,18 @@
+export default function (views_number, fullNumber) {
+  function formattedValue(val, lim, unit) {
+    return Number(parseFloat(val / lim).toFixed(val < 10 * lim ? 1 : 0)) + unit;
+  }
+
+  function format(i, views, mult, compare, limit, units) {
+    while (views >= compare) {
+      limit *= mult;
+      compare *= mult;
+      i += 1;
+    }
+    return i < units.length
+      ? formattedValue(views, limit, units[i])
+      : formattedValue(views * (mult * (i - (units.length - 1))), limit, units[units.length - 1]);
+  }
+
+  return fullNumber ? views_number.toLocaleString() : format(0, views_number, 1000, 1000, 1, ['', 'K', 'M', 'B', 'T']);
+}