Convert About button to a Menu Bar entry

Related pwr-Solaar#2349

lib/solaar/ui/__init__.py

@@ -28,6 +28,7 @@
 from solaar.ui.window import find_device
 
 from . import common, diversion_rules, notify, tray, window
+from .about import show_window as _show_about_window
 
 gi.require_version("Gtk", "3.0")
 from gi.repository import Gio, GLib, Gtk  # NOQA: E402
@@ -102,6 +103,17 @@ def run_loop(startup_hook, shutdown_hook, use_tray, show_window):
     application.connect("activate", _activate)
     application.connect("shutdown", _shutdown, shutdown_hook)
 
+    # Add the menu bar to the application menu
+    app_menu = Gio.Menu()
+
+    about_action = Gio.SimpleAction.new("about", None)
+    about_action.connect("activate", _show_about_window)
+    application.add_action(about_action)
+
+    app_menu.append("About", "app.about")
+
+    application.set_app_menu(app_menu)
+
     application.register()
     if application.get_is_remote():
         print(_("Another Solaar process is already running so just expose its window"))

lib/solaar/ui/about.py

@@ -98,7 +98,7 @@ def _hide(dialog, event):
     return about
 
 
-def show_window(trigger=None):
+def show_window(trigger=None, *args, **kwargs):
     global _dialog
     if _dialog is None:
         _dialog = _create()

lib/solaar/ui/window.py

@@ -32,7 +32,6 @@
 from . import action as _action
 from . import config_panel as _config_panel
 from . import icons as _icons
-from .about import show_window as _show_about_window
 from .common import ui_async as _ui_async
 from .diversion_rules import show_window as _show_diversion_window
 
@@ -319,8 +318,6 @@ def _create_window_layout():
     bottom_buttons_box.set_spacing(20)
     quit_button = _new_button(_("Quit %s") % NAME, "application-exit", _SMALL_BUTTON_ICON_SIZE, clicked=destroy)
     bottom_buttons_box.add(quit_button)
-    about_button = _new_button(_("About %s") % NAME, "help-about", _SMALL_BUTTON_ICON_SIZE, clicked=_show_about_window)
-    bottom_buttons_box.add(about_button)
     diversion_button = _new_button(
         _("Rule Editor"), "", _SMALL_BUTTON_ICON_SIZE, clicked=lambda *_trigger: _show_diversion_window(_model)
     )