(refs #488)Add milestone icons

src/main/twirl/issues/milestones/list.scala.html

@@ -14,11 +14,11 @@
             <th style="background-color: #eee;">
               <span class="small">
                 <a class="button-link@if(state == "open"){ selected}" href="?state=open">
-                  <img src="@assets/common/images/status-open@(if(state == "open"){"-active"}).png"/>
+                  <img src="@assets/common/images/milestone@(if(state == "open"){"-active"}).png"/>
                   @milestones.filter(_._1.closedDate.isEmpty).size Open
                 </a>&nbsp;&nbsp;
                 <a class="button-link@if(state == "closed"){ selected}" href="?state=closed">
-                  <img src="@assets/common/images/status-closed@(if(state == "closed"){"-active"}).png"/>
+                  <img src="@assets/common/images/milestone@(if(state == "closed"){"-active"}).png"/>
                   @milestones.filter(_._1.closedDate.isDefined).size Closed
                 </a>
               </span>