Change fallback icon for abstract nodes to have a grayed out color

editor/create_dialog.cpp

@@ -236,7 +236,10 @@ void CreateDialog::_configure_search_option_item(TreeItem *r_item, const String
 	bool can_instance = (p_cpp_type && ClassDB::can_instance(p_type)) || !p_cpp_type;
 	if (!can_instance) {
 		r_item->set_custom_color(0, search_options->get_theme_color("disabled_font_color", "Editor"));
+		r_item->set_icon(0, EditorNode::get_singleton()->get_class_icon(p_type, "NodeDisabled"));
 		r_item->set_selectable(0, false);
+	} else {
+		r_item->set_icon(0, EditorNode::get_singleton()->get_class_icon(p_type, icon_fallback));
 	}
 
 	if (search_box->get_text() != "") {
@@ -253,7 +256,6 @@ void CreateDialog::_configure_search_option_item(TreeItem *r_item, const String
 
 	const String &description = DTR(EditorHelp::get_doc_data()->class_list[p_type].brief_description);
 	r_item->set_tooltip(0, description);
-	r_item->set_icon(0, EditorNode::get_singleton()->get_class_icon(p_type, icon_fallback));
 
 	if (!p_cpp_type && !script_type) {
 		Ref<Texture2D> icon = EditorNode::get_editor_data().get_custom_types()[custom_type_parents[p_type]][custom_type_indices[p_type]].icon;

editor/icons/NodeDisabled.svg

@@ -0,0 +1 @@
+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="m8 2a6 6 0 0 0 -6 6 6 6 0 0 0 6 6 6 6 0 0 0 6-6 6 6 0 0 0 -6-6zm0 2a4 4 0 0 1 4 4 4 4 0 0 1 -4 4 4 4 0 0 1 -4-4 4 4 0 0 1 4-4z" fill="#999"/></svg>