When the column header is dragged pass the leftmost/rightmost column, make it a no-op, i.e. refuse the reroder.

The old behavior is to position the dragged column to the rightmost. It is counter-intuitive.
Forbid the reordering make more sense and is a de facto accepted standard.

Author: 徐扬斌

src/generic/headerctrlg.cpp

@@ -516,7 +516,7 @@ bool wxHeaderCtrl::EndReordering(int xPhysical)
     {
         return false;
     }
-    if ( static_cast<int>(colNew) != colOld )
+    if ( static_cast<int>(colNew) != colOld && dropped_region != Region::NoWhere )
     {
         wxHeaderCtrlEvent event(wxEVT_HEADER_END_REORDER, GetId());
         event.SetEventObject(this);