dijit.Menu needs enhanced rollover timing

[Pete Smith]

I have reported this in a previous ticket, the dijit.Menu needs enhancements in the way the rollover / flyouts operate. There needs to be some wriggle timing to allow a person to mouse down and to the right diagonally and still get into the menu.

For example, in Firefox, go History -> Recently Closed Tabs. While the menu is shown, you can dribble down into the Show in Sidebar choice for a second, and the menu doesn't come down. The dijit Menus have no such timeout, and makes for a squirreley menu. I have seen people struggle in our customer demos so many times , it is a subtle but annoying shortcoming.

[bill]

Dup of #6773.