WIP: Add a share button in chatroom

src/templates/chatroom_head.html

@@ -16,4 +16,5 @@
     <a class="chatbox-btn configure-chatroom-button fa fa-wrench" title="{{{o.info_configure}}} "></a>
     {[ } ]}
     <a class="chatbox-btn show-room-details-modal fa fa-info-circle" title="{{{o.info_details}}}"></a>
+    <a class="chatbox-btn share-room-details-modal fa fa-share-alt" title="{{{o.info_share}}}"></a>
 </div>