STEPS TO REPRODUCE
- Go to Dashboard.WebHome (or another Dashboard page)
- Edit it in Inline form
- Move (drag & drop) a gadget to the other column or change the gadgets order
- Click 'Save' or 'Save & View'
The page is saved with the new layout.
An editing conflict window is displayed. However, the new layout seems to be saved (navigate to another page, then return to Dashboard page).
The issue could not be reproduced on XWiki 11.1.