There is no link between LayoutAnchorable.IsVisible and LayoutItem.Visibility. I can't say for sure that there should be, however in the MVVMTestApp, this causes manual closing of the tool to not trigger the menu item to un-check.
On a related note, I'd really like to see IsCloseable return to the anchorables.
Comments: ** Comment from web user: adospace **
On a related note, I'd really like to see IsCloseable return to the anchorables.
Comments: ** Comment from web user: adospace **
Thank you for the critical issue report, I've fixed it latest release.
IsCloseable will be replaced by the properies CanClose/CanHide (not yet fully functional, I'm working on it right now)
Ado