Barlayout save doesn't maintain toolbar visibility for modes

Can be reproduced in the test application by adding code to the BarFrom to handle its load and closing events, to load and differentially save the bar layout respectively.

Then, running the barform, right-click on the menus and hide the format bar. Close the form so the layout is saved and reopen. Despite previous actions, the format bar is visible again.

The barmanager itself seems to maintain its own internal session-based record of what toolbars are visible in which application modes (ie try hiding the format bar then closing the document and creating a new document - the format bar stays hidden)...this needs to be persisted in the differential save as well.