(js) Replace vs-repeat by md-virtual-repeat

There're some issues with mdVirtualRepeat that required some changes to
our app:

1. Having multiple directives with md-virtual-repeat doesn't work well.
That why I added a dedicated div for the md-virtual-repeat directive.
2. ui-sref-active doesn't work well for child nodes of the
md-virtual-repeat element. The class was applied repetitively to a
visible child. I now save which message or card is selected and use the
ng-class directive to highlight the selected list item.

UI/WebServerResources/scss/components/autoScrollList/autoScrollList.scss

@@ -1,22 +1,10 @@
 /// autoScrollList.scss -*- Mode: scss; indent-tabs-mode: nil; basic-offset: 2 -*-
 @import 'extends';
 
-// The only selector for vs-repeat lists is this id, we use attributes selector to
-// avoid overspecifying
-// todo: create new classes and refactor templates markup
-// ----------------------------------------------------------------------------
-.vs-repeat-repeated-element {
-  width: 100%;
-}
-
 [id='messagesList'],
 [id='contactsList'] {
   border-top: 44px solid transparent;   // padding for the header.subheader,
-  border-bottom: 2px solid transparent; //close to a hack
-  md-list-item {
-    // dirty fix for vs-repeat damages
-    position: absolute;
-  }
+  border-bottom: 2px solid transparent; // close to a hack
 
   md-list-item {
     transition: background-color $swift-ease-in-duration $swift-ease-in-timing-function,