Better icon for add-contact function in message headers

skins/default/templates/message.html

@@ -49,7 +49,7 @@
 
 <div id="messageframe">
 <div id="messagecanvas">
-<roundcube:object name="messageHeaders" class="headers-table" cellspacing="0" cellpadding="2" addicon="/images/icons/plus.gif" summary="Message headers" />
+<roundcube:object name="messageHeaders" class="headers-table" cellspacing="0" cellpadding="2" addicon="/images/icons/silhouette.png" summary="Message headers" />
 <roundcube:object name="messageAttachments" id="attachment-list" />
 
 <roundcube:object name="blockedObjects" id="remote-objects-message" />

skins/default/templates/messagepreview.html

@@ -8,7 +8,7 @@
 
 <div class="messageheaderbox">
 <roundcube:button command="permaurl" image="/images/icons/extwin.png" width="15" height="15" title="openinextwin" id="messageviewlink" target="_blank" />
-<roundcube:object name="messageHeaders" class="headers-table" cellspacing="0" cellpadding="2" addicon="/images/icons/plus.gif" summary="Message headers" />
+<roundcube:object name="messageHeaders" class="headers-table" cellspacing="0" cellpadding="2" addicon="/images/icons/silhouette.png" summary="Message headers" />
 <roundcube:object name="messageAttachments" id="attachment-list" />
 </div>