feature-2920
[* ] Changed DapStyleHolder to AppStyleSheetHandler (became singletone, refactoring) [* ] Rename StyleSubcontrol to StyledSubcontrol [+ ] Added templatecreate() method
[* ] Changed DapStyleHolder to AppStyleSheetHandler (became singletone, refactoring) [* ] Rename StyleSubcontrol to StyledSubcontrol [+ ] Added templatecreate() method