Hover-effect for new messages

stylesheets/_conversation.scss

@@ -744,6 +744,10 @@ li.entry .error-icon-container {
       .icon {
         @include color-svg('/images/down.svg', white);
       }
+
+      :hover {
+        background-color: #1472bd;
+      }
     }
   }
 }

stylesheets/android-dark.scss

@@ -230,11 +230,15 @@ $text-dark: #CCCCCC;
       .icon:hover {
 	background-color: white;
       }
+
       &.new-messages  {
         background-color: $blue;
         .icon {
           @include color-svg('/images/down.svg', white);
         }
+	:hover {
+	  background-color: #1472bd;
+	}
       }
     }
   }