Add wxFD_NO_FOLLOW style for wxFileDialog.

This style tells the dialog to return the paths of the link being selected
without dereferencing it.

Currently only implemented under wxMSW as the links are not dereferenced by
default in wxGTK anyhow. But we may want to change this and implement it there
too for consistency in the future.

Closes #15429.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76085 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/filedlg.h

@@ -10,6 +10,7 @@ enum
     wxFD_OPEN              = 0x0001,
     wxFD_SAVE              = 0x0002,
     wxFD_OVERWRITE_PROMPT  = 0x0004,
+    wxFD_NO_FOLLOW         = 0x0008,
     wxFD_FILE_MUST_EXIST   = 0x0010,
     wxFD_MULTIPLE          = 0x0020,
     wxFD_CHANGE_DIR        = 0x0080,
@@ -119,6 +120,13 @@ const char wxFileSelectorDefaultWildcardStr[];
     @style{wxFD_OVERWRITE_PROMPT}
            For save dialog only: prompt for a confirmation if a file will be
            overwritten.
+    @style{wxFD_NO_FOLLOW}
+           Directs the dialog to return the path and file name of the selected
+           shortcut file, not its target as it does by default. Currently this
+           flag is only implemented in wxMSW and the non-dereferenced link path
+           is always returned, even without this flag, under Unix and so using
+           it there doesn't do anything. This flag was added in wxWidgets
+           3.1.0.
     @style{wxFD_FILE_MUST_EXIST}
            For open dialog only: the user may only select files that actually
            exist. Notice that under OS X the file dialog with @c wxFD_OPEN