feat(editor): the work of the editor sessions not committed yet, as it stands: a curve traced on from the end of the diverging track of a switch goes on at its radius with no transition in, or from a straight right at the switch (alignment start_held, fit_going_on), the plan taking an end adjoining R 10 km or more for a straight; the switches and slips laid into curves, slid along them and laid alone on one straight (frame_path, switch slide); the route plan reading curves going on from the tracks adjoining, the kept designs taken or forgotten; the orthophoto and terrain model settings, downloads and layers, the tracks onto the terrain; the curvature of a path in the plan (bezier::plan_curvature); the Polish texts of all of it. Not built as committed

application/editoruilayer.h

@@ -112,6 +112,13 @@ class editor_ui : public ui_layer
 	void set_file_actions(std::function<void()> Save, std::function<void()> Export);
 	void set_new_scenery(std::function<void()> New) { m_newscenery = std::move(New); }
 	void set_open_scenery(std::function<void()> Open) { m_openscenery = std::move(Open); }
+	// draws the base layers under the scenery at the bottom of the layers window (they live in the editor mode)
+	void set_base_layers(std::function<void()> Renderer) { m_layerspanel.base_layers = std::move(Renderer); }
+	void show_layers()
+	{
+		m_layerspanel.is_open = true;
+		m_layerspanel.focus = true;
+	}
 	// part of the main window between the docked windows, where the 3d view is seen; for the overlays placed in it
 	static glm::vec2 view_min()
 	{