Remove extra borders around wxFilePickerCtrl in wxOSX

Don't use extra borders to reserve space for the focus ring, this breaks
alignment of wxFilePickerCtrl with the other controls.

Closes #17416.

docs/changes.txt

@@ -66,6 +66,7 @@ wxMSW:
 
 wxOSX:
 
+- Remove extra borders around wxFilePickerCtrl (John Roberts).
 - Turn off automatic quotes substitutions in wxTextCtrl (Xlord2).
 
 

include/wx/pickerbase.h

@@ -152,25 +152,12 @@ protected:
 
     int GetDefaultPickerCtrlFlag() const
     {
-        // on macintosh, without additional borders
-        // there's not enough space for focus rect
-        return wxALIGN_CENTER_VERTICAL
-#ifdef __WXMAC__
-            | wxTOP | wxRIGHT | wxBOTTOM
-#endif
-            ;
+        return wxALIGN_CENTER_VERTICAL;
     }
 
     int GetDefaultTextCtrlFlag() const
     {
-        // on macintosh, without wxALL there's not enough space for focus rect
-        return wxALIGN_CENTER_VERTICAL
-#ifdef __WXMAC__
-            | wxALL
-#else
-            | wxRIGHT
-#endif
-            ;
+        return wxALIGN_CENTER_VERTICAL | wxRIGHT;
     }
 
     void PostCreation();