Add wxSystemThemedControl and use it in wxMSW

wxSystemThemedControl allows to use the "system theme" (i.e. the theme used by
the system applications such as file manager and which can, surprisingly, be
different from the default one). Currently it is only implemented for wxMSW
and does nothing under the other platforms.

Use wxSystemThemedControl for wxDataViewCtrl, wxListCtrl and, optionally, if
wxTR_TWIST_BUTTONS style is specified, wxTreeCtrl to give them more native
appearance under MSW.

Closes #16414.

include/wx/generic/dataview.h

@@ -220,6 +220,8 @@ protected:
     // Reset all columns currently used for sorting.
     void ResetAllSortColumns();
 
+    virtual void DoEnableSystemTheme(bool enable, wxWindow* window) wxOVERRIDE;
+
 public:     // utility functions not part of the API
 
     // returns the "best" width for the idx-th column