Added new mail notification icon for logged in users

(DBOINCP-170)

drupal/sites/default/boinc/themes/boinc/css/pages.css

@@ -685,6 +685,26 @@ table.user-projects {
   padding: 3px 5px 1px;
   background: #747477;
 }
+.new-mail-indicator {
+  background: url(../images/icon-mail.png) 0 0 no-repeat;
+  background-size: 25px;
+  float: right;
+  height: 25px;
+  margin-top: 5px;
+  text-align: center;
+  width: 25px;
+}
+.new-mail-indicator .item-count-wrapper {
+  background: none;
+  margin: 0;
+  padding: 0;
+}
+.new-mail-indicator .item-count {
+  background-color: #800;
+  color: #fff;
+  margin: 6px 0 0;
+  padding: 0 1px;
+}
 
 .item-list .pager {
   font-size: 10px;

drupal/sites/default/boinc/themes/boinc/templates/page.tpl.php

@@ -148,6 +148,21 @@
     <div id="header-wrapper" class="shadow">
     
     <div id="header"><div class="section clearfix">
+    
+    <?php if ($logged_in): ?>
+      <?php $pm_count = privatemsg_unread_count(); ?>
+      <?php if ($pm_count): ?>
+        <a href="<?php echo $base_path; ?>messages">
+          <div class="new-mail-indicator">
+            <div class="item-count-wrapper">
+              <span class="item-count">
+                <?php print $pm_count; ?>
+              </span>
+            </div>
+          </div>
+        </a>
+      <?php endif; ?>
+    <?php endif; ?>
 
       <?php if ($logo): ?>
         <a href="<?php print $front_page; ?>" title="<?php print bts('Home'); ?>" rel="home" id="logo"><img src="<?php print $logo; ?>" alt="<?php print bts('Home'); ?>" /></a>