Added license validation and settings

web/templates/head.html

@@ -46,6 +46,7 @@
 
     <script>
         window.mm_config = {{ .ClientCfg }};
+        window.mm_license = {{ .ClientLicense }};
         window.mm_team = {{ .Team }};
         window.mm_user = {{ .User }};
         window.mm_channel = {{ .Channel }};