add ws and ws-tree-widget

open/gcube-5.13.1.yaml

@@ -35,6 +35,8 @@ gCube_release:
      Widgets:
        - name: ckan-content-moderator-widget
          version: 1.1.0
+       - name: worlspace-tree-widget
+         version: 6.35.2  
 
      Portlets:
        - name: accounting-dashboard
@@ -43,3 +45,5 @@ gCube_release:
          version: 2.3.1
        - name: gcube-ckan-datacatalog
          version: 2.2.3
+       - name: workspace
+         version: 6.28.6