Steps to reproduce:
1. Go to Dockbar > Edit page
2. Select parent node (Public Pages) in the tree of pages.
3. Click in Export icon.
Result: Apparently nothing happens but if you close the 'edit page' dialog you can see the 'export dialog'
Ussing the import icon you get the same behavior.
Expected Result: the export or import dialog is accesible without needed of close the current 'edit page' dialog.