* Support for IWBPopupMenuConfig dropped in favour of ICommandBarConfig to standardise with information pane command bars.
* All command bar related code, including menu configuration moved from UWBPopupMenus.pas to new UWBCommandBars.pas unit. Uses classes that descend from TCommandBarMgr and TPopupMenuWrapper in UCommandBars.pas unit.
* UWBPopupMenus.pas re-implemented to provide popup menu manager object and associated custom popup menu.
