Zone fill: display progress bar when refilling a zone after edition.

Previously, refilling a zone after edition was made silently,
thus creating not understandable but very noticeable freeze time for complex zones.

pcbnew/tools/point_editor.cpp

@@ -1,7 +1,7 @@
 /*
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
- * Copyright (C) 2013-2018 CERN
+ * Copyright (C) 2013-2019 CERN
  * @author Maciej Suminski <maciej.suminski@cern.ch>
  *
  * This program is free software; you can redistribute it and/or
@@ -46,6 +46,7 @@ using namespace std::placeholders;
 #include <class_board.h>
 #include <class_module.h>
 #include <connectivity/connectivity_data.h>
+#include <widgets/progress_reporter.h>
 
 #include "zone_filler.h"
 
@@ -638,6 +639,8 @@ void POINT_EDITOR::finishItem()
         if( zone->IsFilled() && m_refill )
         {
             ZONE_FILLER filler( board() );
+            WX_PROGRESS_REPORTER reporter( getEditFrame<PCB_BASE_FRAME>(), _( "Refill Zones" ), 4 );
+            filler.SetProgressReporter( &reporter );
             filler.Fill( { zone } );
         }
     }