Vertical alignment of context menu

[jfournier]

This is actually something that needs to be done in Jx, but when the maps context menu is opened in a fusion application and the mouse pointer is near the bottom of the map, the menu can go off the bottom of the map/page. We should be able to detect the available space and adjust the top of the menu to allow for sufficient space to see the entire menu. Likewise, opening near the right edge of a container or the page should push the menu open to the left of the pointer. The solution also needs to accommodate sub menus.

[pagameba]

In updating to the new version of Jx, this is now fixed. Flyouts, menus, and dialogs now auto-position themselves to be on screen as much as possible.