Added themed selection, Options, EditorType, OnEditorCreated

* Added Options property (ngoMultiCellSelect, ngoThemed, ngoExcel)
* ngoMultiCellSelect - allows multi cell select
* ngoThemed - use Windows theme support instead of original owner drawn
selection
* ngoExcel - enable/disable excel like capabilities (the small dot on
the right bottom selection corner)
* Added property EditorType to Column
* Added key F2 for begin edit
* Added event OnEditorCreated(nicegrid, editcontrol)
* Removed component TNiceGridSync
* Removed additinal support for caret
Fix thick borders of fixed cells