Rework on undo/redo and block functions: more efficient code to undo/redo block move and mirror operations

eeschema/geometric_transforms.cpp

@@ -137,9 +137,7 @@ void MirrorOneStruct( SCH_ITEM* DrawStruct, wxPoint& aMirrorPoint )
         else if( DrawText->m_Orient == 2 )  /* invert horizontal text*/
             DrawText->m_Orient = 0;
 
-        px = DrawText->m_Pos;
-        MirrorYPoint( px, aMirrorPoint );
-        DrawText->m_Pos.x = px.x;
+        MirrorYPoint( DrawText->m_Pos, aMirrorPoint );
         break;
 
     case TYPE_SCH_COMPONENT:
@@ -149,7 +147,7 @@ void MirrorOneStruct( SCH_ITEM* DrawStruct, wxPoint& aMirrorPoint )
         WinEDA_SchematicFrame* frame = (WinEDA_SchematicFrame*) wxGetApp().GetTopWindow();
         frame->CmpRotationMiroir( DrawLibItem, NULL, CMP_MIROIR_Y );
         MirrorYPoint( DrawLibItem->m_Pos, aMirrorPoint );
-        dx -= DrawLibItem->m_Pos.x;
+        dx -= DrawLibItem->m_Pos.x;     // dx,0 is the move vector for this transform
 
         for( int ii = 0; ii < DrawLibItem->GetFieldCount(); ii++ )
         {

eeschema/schematic_undo_redo.cpp

@@ -374,6 +374,7 @@ void WinEDA_SchematicFrame::PutDataInPreviousState( PICKED_ITEMS_LIST* aList )
         {
             wxPoint moveVector = - aList->m_TransformPoint;
             MoveOneStruct( item, moveVector );
+            aList->m_TransformPoint = moveVector;
         }
             break;