UsercaseAppFactory introduced | AppFactories refactored to UsercaseAppFactory
cleanup
TextOkCancelBox: refactored | Swf.TextOkCancelBoxBackend refactored  Xwt.TextOkCancelBoxBackend implemented
Wpf.Toolbar: implemented ToolStripButton | ToolStripDropDownButton | ArrangerToolStripBackend | MarkerToolStripBackend | SplitViewToolStripBackend
cleanups
Xwt.SplitViewBackend: ShowTextDialog implemented
Iconeria: added a DefaultSize