File/dir dialog styles and other changes (patch 1488371):

- check invalid combinations of styles in wxFileDialogBase::Create()
- use wxFD_XXX naming convention for wxFileDialog styles
- replaces wxDD_NEW_DIR_BUTTON with wxDD_DIR_MUST_EXIST
- removes #ifdef __WXGTK24__ / #endif blocks from wxGTK code
- removes wxFileDialogBase::Get/SetStyle and wxFileDialogBase::m_fileName
- renames wxDirDialogGTK to wxDirDialog


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39402 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/filedlg.h

@@ -25,8 +25,10 @@ public:
                  ,const wxString& rsDefaultDir = wxEmptyString
                  ,const wxString& rsDefaultFile = wxEmptyString
                  ,const wxString& rsWildCard = wxFileSelectorDefaultWildcardStr
-                 ,long            lStyle = 0
-                 ,const wxPoint&  rPos = wxDefaultPosition
+                 ,long            lStyle = wxFD_DEFAULT_STYLE
+                 ,const wxPoint&  rPos = wxDefaultPosition,
+                  const wxSize& sz = wxDefaultSize,
+                  const wxString& name = wxFileDialogNameStr
                 );
 
     virtual void GetPaths(wxArrayString& rasPath) const;