Inital support for multi-tab loging

web/templates/welcome.html

@@ -11,7 +11,7 @@
         <div class="row main">
           <div class="app__content">
             <div class="welcome-info">
-              <h1>Welcome to {{ .ClientProps.SiteName }}!</h1>
+              <h1>Welcome to {{ .ClientCfg.SiteName }}!</h1>
               <p>
                   You do not appear to be part of any teams. Please contact your
                   administrator to have him send you an invitation to a private team.