Deprecate wxPathExists, make wxDirExists used everywhere, minor source cleaning.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33350 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/filefn.cpp

@@ -1195,7 +1195,7 @@ bool wxRmdir(const wxString& dir, int WXUNUSED(flags))
 }
 
 // does the path exists? (may have or not '/' or '\\' at the end)
-bool wxPathExists(const wxChar *pszPathName)
+bool wxDirExists(const wxChar *pszPathName)
 {
     wxString strPath(pszPathName);