* ImageBasedMapData extended with IsConfigured property. * Introduced two ObjectProperties implementations for BackgroundMapDataContainer (1 specialized for WmtsMapData, one general), and a factory to abstract the creation logic away from callers. ** Removed BackgroundWmtsMapDataProperties as it's been made obsolete. * Removed BackgroundMapDataContext, as BackgroundMapDataContainer is directly available in the object tree. (Separate Context object no longer required) Related to Issue [WTI-1144] git-svn-id: https://repos.deltares.nl/repos/WettelijkToetsInstrumentarium/trunk@8338 5a3db67b-de53-47b5-99c8-a1c30a6650e2