Mon Feb 9 21:27:27 EST 2009 Adam Vogt * X.L.Mosaic: prevent users from causing non-termination with negative elements Wed Feb 18 16:33:11 EST 2009 Adam Vogt * small cleanup in X.L.Mosaic Wed Feb 18 17:44:31 EST 2009 Adam Vogt * Add TabbedModifier layout modifer Allows arbitrary windows to be combined into tabs groups. The group focus follows the StackSet focus, and groups can be combined with a simple message. Currently the Merge message's parameters can only be provided by a new WindowNavigation message (Apply).