GUACAMOLE-1896: Refresh connection parameters when focused client updates.

guacamole/src/main/frontend/src/app/client/directives/guacTiledClients.js

@@ -92,6 +92,11 @@ angular.module('client').directive('guacTiledClients', [function guacTiledClient
             $scope.$emit('guacClientFocused', focusedClient);
         });
 
+        // Notify whenever arguments of currently-focused client changes
+        $scope.$watch('getFocusedClient().arguments', function focusedClientParametersChanged() {
+            $scope.$emit('guacClientFocused', $scope.getFocusedClient());
+        }, true);
+
         /**
          * Returns a callback for guacClick that assigns or updates keyboard
          * focus to the given client, allowing that client to receive and