added higher z-index to featured image to make sit on top of sidebar and...

added higher z-index to featured image to make sit on top of sidebar and cleared collapse menu below image

django/website/media/less/internews.less

@@ -169,6 +169,7 @@ body {
     .sidebar-nav.navbar-collapse {
         padding-left: 0;
         padding-right: 0;
+        clear:both;
     }
     margin-bottom:20px;
 }
@@ -239,6 +240,7 @@ body {
   background-repeat:no-repeat;
   background-size:cover;
   min-height:200px;
+  z-index:@zindex-navbar-fixed;
 }
 
 @media(max-width:@screen-xs) {