do not show videconf button when jitsi-meet feature is disabled

tracim/tracim/controllers/workspace.py

                 show_archived=show_archived,
             )
         )
+        videoconf_enabled = CFG.get_instance().JITSI_MEET_ACTIVATED
 
         dictified_workspace = Context(CTX.WORKSPACE).toDict(workspace, 'workspace')
         webdav_url = CFG.get_instance().WSGIDAV_CLIENT_BASE_URL
             result=dictified_workspace,
             fake_api=fake_api,
             webdav_url=webdav_url,
+            videoconf_enabled=videoconf_enabled,
             show_deleted=show_deleted,
             show_archived=show_archived,
         )

tracim/tracim/templates/workspace/getone.mak

 </%def>
 
 <%def name="SIDEBAR_RIGHT_CONTENT()">
- ${TOOLBAR.WORKSPACE_USER(fake_api.current_user, result.workspace)}
+ ${TOOLBAR.WORKSPACE_USER(fake_api.current_user, result.workspace, videoconf_enabled)}
 </%def>
 
 <%def name="REQUIRED_DIALOGS()">

tracim/tracim/templates/workspace/toolbar.mak

     ## SIDEBAR RIGHT [END]
 </%def>
 
-<%def name="WORKSPACE_USER(current_user, workspace)">
+<%def name="WORKSPACE_USER(current_user, workspace, videoconf_enabled)">
     <div>
+        % if videoconf_enabled:
         ${JITSI_MEET_BUTTON(current_user, workspace)}
+       % endif
     </div> <!-- # End of side bar right -->
 </%def>