nav-bar: added placeholder for notice box.

rhodecode/public/css/navigation.less

@@ -682,3 +682,14 b' ul#context-pages {'
    color: @nav-grey;
    opacity: 1;
 }
+
+.notice-box {
+    display:block !important;
+    padding: 9px 0 !important;
+}
+
+.menulabel-notice {
+    border: 1px solid @color5;
+    padding:7px 10px;
+    color: @color5;
+}

rhodecode/templates/base/base.mako

@@ -385,9 +385,18 b''
             return "active"
         return ""
     %>
-    <ul id="quick" class="main_nav navigation horizontal-list">
 
-      ## Main filter
+    <ul id="quick" class="main_nav navigation horizontal-list">
+       ## notice box for important system messages
+       <li style="display: none">
+          <a class="notice-box" href="#openNotice" onclick="showNoticeBox(); return false">
+            <div class="menulabel-notice" >
+                0
+            </div>
+          </a>
+       </li>
+
+        ## Main filter
        <li>
         <div class="menulabel main_filter_box">
             <div class="main_filter_input_box">