fix(web): use a distinct salt for TOTP authentication

If TOTP is enabled for a user, it will be disabled until the user
configure it again, which will generate a new private salt.

UI/WebServerResources/js/Main/Main.app.js

@@ -44,6 +44,11 @@
           if (data.totpmissingkey) {
             vm.loginState = 'totpcode';
           }
+          else if (data.totpdisabled) {
+            vm.loginState = 'totpdisabled';
+            vm.cn = data.cn;
+            vm.url = data.url;
+          }
           else {
             vm.loginState = 'logged';
             vm.cn = data.cn;