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

src/common/docview.cpp

@@ -305,7 +305,7 @@ bool wxDocument::SaveAs()
             wxFileNameFromPath(GetFilename()),
             docTemplate->GetDefaultExtension(),
             filter,
-            wxSAVE | wxOVERWRITE_PROMPT,
+            wxFD_SAVE | wxFD_OVERWRITE_PROMPT,
             GetDocumentWindow());
 
     if (tmp.empty())