anchor.diff:      column_0: width 50% of char cell, it's not used
       column_1: width 50% of char cell, it's used for plugins marks
     and 2 edge columns:
  -    left_edge: NWidthSmall pixels, it's used for line-states
  -    right_edge: NWidthSmall pixels, it's used for selections
  +    right_edge: width 50% of char cell, it's used for selections
     so, for different micromap rect widths, some columns may overlap, e.g. right_edge and column_1
   }
   type
  -  TAppMicromapMarkPos = (markColumn, markFull, markLeft, markRight);
  +  TAppMicromapMarkPos = (markColumn, markFull, markRight);
   const
     cTagOccurrences = 101; //see plugin 'Highlight Occurrences'
     cTagSpellChecker = 105; //see plugin 'Spell Checker'
  
positive.code:     Result:= Ed.RectMicromapMark(AColumn, NLine1, NLine2, ARect);
      OffsetRect(Result, 0, -ARect.Top);
      case AMarkPos of
        markLeft:
          begin
            Result.Left:= 0;
            Result.Right:= 0 + NWidthSmall;
          end;
        markRight:
          begin
            Result.Right:= ARect.Width;
  
negative.code:       cLineStateSaved: XColor.FromColor(Ed.Colors.StateSaved);
        else Continue;
      end;
      FMicromapBmp.FillRect(GetItemRect(0{column_0}, i, i, markColumn), XColor);
    end;
  
    //paint selections
  