Gui: Scene inspector improvements (#18781)

* Improve naming for root scene graph switch/separator nodes.

* Improve scene graph inspector.

This commit improves the scene graph inspector by improving the UI
layout and displaying information in a more human-readable way.

Instead of having a main generic string column for all node-specific
data, introduce specific columns for node name, memory address and data.

Better visualization was also added for `SoDrawStyle`, `SoPickStyle`
and `SoCoordinate3` node types.

src/Gui/ViewProviderGeometryObject.cpp

@@ -101,12 +101,15 @@ ViewProviderGeometryObject::ViewProviderGeometryObject()
     pcShapeMaterial = new SoMaterial;
     setCoinAppearance(mat);
     pcShapeMaterial->ref();
+    pcShapeMaterial->setName("ShapeMaterial");
 
     pcBoundingBox = new Gui::SoFCBoundingBox;
     pcBoundingBox->ref();
+    pcBoundingBox->setName("BoundingBox");
 
     pcBoundColor = new SoBaseColor();
     pcBoundColor->ref();
+    pcBoundColor->setName("BoundColor");
 
     sPixmap = "Feature";
 }
@@ -302,6 +305,7 @@ void ViewProviderGeometryObject::showBoundingBox(bool show)
         blue = ((bbcol >> 8) & 0xff) / 255.0F;
 
         pcBoundSwitch = new SoSwitch();
+        pcBoundSwitch->setName("BoundSwitch");
         auto pBoundingSep = new SoSeparator();
         auto lineStyle = new SoDrawStyle;
         lineStyle->lineWidth = 2.0F;