anchor.diff:    C.FillRect(RectText);
     RectText:= Rect(ARect.Left+NIndentL, ARect.Top, ARect.Right-NIndentR, ARect.Bottom);
   
  -  if FOptShowFlat then
  +  if FOptShowFlat and FOptShowFlatSep then
     begin
       C.Pen.Color:= ColorBorderActive;
       i:= ARect.Left - FOptSpaceBetweenTabs div 2;
  
positive.code:     FOptWhichActivateOnClose: TATTabActionOnClose;
      FOptCaptionAlignment: TAlignment;
      FOptShowFlat: boolean;
      FOptShowXButtons: TATTabShowClose; //show mode for "x" buttons
      FOptShowArrowsNear: boolean;
      FOptShowPlusTab: boolean; //show "plus" tab
  
negative.code:   _InitOptHotFontStyleUsed = false;
  
    _InitOptShowFlat = false;
    _InitOptShowFlatSep = true;
    _InitOptPosition = atpTop;
    _InitOptFillWidth = true;
    _InitOptFillWidthLastToo = false;
  