LibGUI: Add MenuBar::add_menu(name)

This allows us to construct menus in a more natural way:

    auto& file_menu = menubar->add_menu("File");
    file_menu.add_action(...);

Instead of the old way:

    auto file_menu = GUI::Menu::construct();
    file_menu->add_action(...);
    menubar->add_menu(file_menu);

1 files changed, 2 insertions, 3 deletions

diff --git a/Applications/Calendar/main.cpp b/Applications/Calendar/main.cpp
index d1a2ef7d64..769cb33d53 100644
--- a/Applications/Calendar/main.cpp
+++ b/Applications/Calendar/main.cpp
@@ -66,12 +66,11 @@ int main(int argc, char** argv)
 
     auto menubar = make<GUI::MenuBar>();
 
-    auto app_menu = GUI::Menu::construct("Calendar");
-    app_menu->add_action(GUI::CommonActions::make_quit_action([](auto&) {
+    auto& app_menu = menubar->add_menu("Calendar");
+    app_menu.add_action(GUI::CommonActions::make_quit_action([](auto&) {
         GUI::Application::the().quit(0);
         return;
     }));
-    menubar->add_menu(move(app_menu));
     app.set_menubar(move(menubar));
 
     app.exec();