Removing LayerGroups from MapDefinition doesn't work as expected

[gBecker]

When removing top level groups from MapDefinition in MapDefinition editor only the direct child layer is deleted. All child layergroups and their layers are already there. They are not visible at the editor itself but you can see them when opening the xml editor.

Have a look at the attached image:

When removing "LayerGroup1" and "LayerGroup2" you would expected to have removed all layers and layergroups from the MapDefinition. But the xml says something different:

<?xml version="1.0" encoding="utf-8"?>
<MapDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="MapDefinition-1.0.0.xsd">
  <Name>New Map</Name>
  <CoordinateSystem>PROJCS["DHDN.Gauss3d-3",GEOGCS["DHDN.LL",DATUM["DHDN",SPHEROID["BESSEL",6377397.155,299.15281535],TOWGS84[582.0000,105.0000,414.0000,-1.040000,-0.350000,3.080000,8.30000000]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],PARAMETER["false_easting",3500000.000],PARAMETER["false_northing",0.000],PARAMETER["scale_factor",1.000000000000],PARAMETER["central_meridian",9.00000000000000],PARAMETER["latitude_of_origin",0.00000000000000],UNIT["Meter",1.00000000000000]]</CoordinateSystem>
  <Extents>
    <MinX>3469000</MinX>
    <MaxX>3484807.5951835942</MaxX>
    <MinY>5547000</MinY>
    <MaxY>5565687.863</MaxY>
  </Extents>
  <BackgroundColor>ffffffff</BackgroundColor>
  <Metadata>&lt;MapDescription&gt;Basiskarten&lt;/MapDescription&gt;</Metadata>
  <MapLayer>
    <Name>Layer3</Name>
    <ResourceId>Library://FFM/CSOGIS/Layer/Erfassen/Hoehenauskunft.LayerDefinition</ResourceId>
    <Selectable>true</Selectable>
    <ShowInLegend>true</ShowInLegend>
    <LegendLabel>Layer3</LegendLabel>
    <ExpandInLegend>true</ExpandInLegend>
    <Visible>true</Visible>
    <Group>LayerGroup3</Group>
  </MapLayer>
  <MapLayer>
    <Name>Layer4</Name>
    <ResourceId>Library://FFM/CSOGIS/Layer/Erfassen/Wolke.LayerDefinition</ResourceId>
    <Selectable>true</Selectable>
    <ShowInLegend>true</ShowInLegend>
    <LegendLabel>Layer4</LegendLabel>
    <ExpandInLegend>true</ExpandInLegend>
    <Visible>true</Visible>
    <Group>LayerGroup4</Group>
  </MapLayer>
  <MapLayerGroup>
    <Name>LayerGroup3</Name>
    <Visible>true</Visible>
    <ShowInLegend>true</ShowInLegend>
    <ExpandInLegend>true</ExpandInLegend>
    <LegendLabel>LayerGroup3</LegendLabel>
    <Group>LayerGroup2</Group>
  </MapLayerGroup>
  <MapLayerGroup>
    <Name>LayerGroup4</Name>
    <Visible>true</Visible>
    <ShowInLegend>true</ShowInLegend>
    <ExpandInLegend>true</ExpandInLegend>
    <LegendLabel>LayerGroup4</LegendLabel>
    <Group>LayerGroup3</Group>
  </MapLayerGroup>
</MapDefinition>

[gBecker]

Demo LayerTree

[gBecker]

Only the LayerGroups are invisible in editor, the layers are visible in the editor when switching to tab "Layer by Drawing Order"

[jng]

Fixed r6267