feat(editor): pins of the docks: an unpinned dock hides its windows in a strip at the edge of the main window, a tab of the strip shows its window over the 3d view when pointed at for a moment or clicked, and it goes back when the cursor leaves it or on a click elsewhere, but not while it's in use (button held, popup open, typing, drag); pin in the tab bar of each dock, or Unpin in its window menu where the tabs leave no room; pin in the title of the shown window, or docking it by hand, puts the dock back next to the docks at that edge; Ctrl+Space (also in Mode windows) unpins all docks for the most of the view, or pins them back the way they were; unpinned docks kept in imgui.ini, cleared by Reset window layout; Polish translation

application/uilayer.cpp

@@ -19,6 +19,7 @@ http://mozilla.org/MPL/2.0/.
 #include "utilities/translation.h"
 #include "application/application.h"
 #include "application/editormode.h"
+#include "application/editoruilayer.h"
 
 #include "imgui/imgui_impl_glfw.h"
 
@@ -269,6 +270,8 @@ bool ui_layer::init(GLFWwindow *Window)
     IMGUI_CHECKVERSION();
     ImGui::CreateContext();
     m_imguiio = &ImGui::GetIO();
+	// imgui.ini is read with the first frame, which may be of another mode than the editor
+	editor_ui::register_settings();
 
 	m_imguiio->ConfigFlags |= ImGuiConfigFlags_NoMouseCursorChange;
     // m_imguiio->ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;