Add links to download one or all attachments

Also removed the contextual menu over file attachments and changed the
label color when moving over the file attachments.

UI/Templates/MailerUI/UIxMailMainFrame.wox

@@ -211,12 +211,6 @@
     </ul>
   </div>
 
-  <div class="menu" id="attachmentMenu">
-    <ul>
-      <li id="save_attachment"><var:string label:value="Save Attachment"/></li>
-    </ul>
-  </div>
-
   <div id="leftPanel">
     <div class="titlediv"><var:string label:value="Folders" /></div>
     <div id="folderTreeContent"><!-- space --></div>