Drive the layer selection dialog from tools

Instead of the dialog having to discover the current renderer, we now have the tools directly set the layer it should
present as selected. This removes an unnecessary assumption in `LayerSelectionDialog` while also making it clear in
`DefaultTool` that the dialog is being updated to use the same layer expected by the tool.

src/main/java/net/rptools/maptool/client/tool/DefaultTool.java

@@ -83,7 +83,7 @@ protected void attachTo(ZoneRenderer renderer) {
     super.attachTo(renderer);
     this.renderer = renderer;
     selectedLayer = renderer.getActiveLayer();
-    layerSelectionDialog.updateViewList();
+    layerSelectionDialog.setSelectedLayer(selectedLayer);
   }
 
   @Override

src/main/java/net/rptools/maptool/client/tool/layerselectiondialog/LayerSelectionDialog.java

@@ -20,7 +20,6 @@
 import javax.swing.JList;
 import javax.swing.JPanel;
 import javax.swing.ListSelectionModel;
-import net.rptools.maptool.client.MapTool;
 import net.rptools.maptool.client.swing.AbeillePanel;
 import net.rptools.maptool.model.Zone;
 
@@ -51,11 +50,6 @@ public void fireViewSelectionChange() {
     }
   }
 
-  public void updateViewList() {
-    getLayerList()
-        .setSelectedValue(MapTool.getFrame().getCurrentZoneRenderer().getActiveLayer(), true);
-  }
-
   private JList<Zone.Layer> getLayerList() {
 
     if (list == null) {
@@ -83,7 +77,7 @@ private JList<Zone.Layer> getLayerList() {
   }
 
   public void setSelectedLayer(Zone.Layer layer) {
-    list.setSelectedValue(layer, true);
+    getLayerList().setSelectedValue(layer, true);
   }
 
   public interface LayerSelectionListener {