Nested networks UI (#885)

* Initial UI for nested nodes

* Clean up deleting nodes

* Print address of nested network

* Add exiting network message

* Implement the breadcrumb trail

* Remove whitespace

* Fix double click not registering in Chromium

Co-authored-by: Keavon Chambers <keavon@keavon.com>

editor/src/messages/layout/layout_message_handler.rs

@@ -233,6 +233,10 @@ impl LayoutMessageHandler {
 				layout_target,
 				layout: layout.clone().unwrap_menu_layout(action_input_mapping).layout,
 			},
+			LayoutTarget::NodeGraphBar => FrontendMessage::UpdateNodeGraphBarLayout {
+				layout_target,
+				layout: layout.clone().unwrap_widget_layout(action_input_mapping).layout,
+			},
 			LayoutTarget::PropertiesOptions => FrontendMessage::UpdatePropertyPanelOptionsLayout {
 				layout_target,
 				layout: layout.clone().unwrap_widget_layout(action_input_mapping).layout,

editor/src/messages/layout/utility_types/misc.rs

@@ -9,6 +9,7 @@ pub enum LayoutTarget {
 	DocumentMode,
 	LayerTreeOptions,
 	MenuBar,
+	NodeGraphBar,
 	PropertiesOptions,
 	PropertiesSections,
 	ToolOptions,