Some fixes and enhancements befor javascript rework

web/app/templates/interactions/scroll_to_top.html.j2

@@ -0,0 +1,6 @@
+<!-- Scroll to top element -->
+<div id="menu-scroll-to-top-div" class="fixed-action-btn direction-top active hide" style="bottom: 45px; right: 24px;">
+  <a id="menu-scroll-to-top" class="btn btn-floating btn-large cyan">
+    <i class="material-icons">arrow_upward</i>
+  </a>
+</div>