LibWebView+UI: Add option to render an icon for application submenus

Libraries/LibWebView/Menu.h

@@ -184,6 +184,9 @@ public:
     Span<MenuItem> items() { return m_items; }
     ReadonlySpan<MenuItem> items() const { return m_items; }
 
+    void set_render_group_icon(bool render_group_icon) { m_render_group_icon = render_group_icon; }
+    bool render_group_icon() const { return m_render_group_icon; }
+
     template<typename Callback>
     void for_each_action(Callback const& callback)
     {
@@ -207,6 +210,7 @@ private:
     Vector<MenuItem> m_items;
 
     bool m_is_group { false };
+    bool m_render_group_icon { false };
 };
 
 }

UI/AppKit/Interface/Menu.mm

@@ -256,6 +256,9 @@ static void add_items_to_menu(NSMenu* menu, Span<WebView::Menu::MenuItem> menu_i
                                                  keyEquivalent:@""];
                 [item setSubmenu:application_submenu];
 
+                if (submenu->render_group_icon())
+                    set_control_image(item, @"folder");
+
                 [menu addItem:item];
             },
             [&](WebView::Separator) {

UI/Qt/Menu.cpp

@@ -255,6 +255,9 @@ static void add_items_to_menu(QMenu& menu, QWidget& parent, Span<WebView::Menu::
                 auto* qsubmenu = new QMenu(qstring_from_ak_string(submenu->title()), &menu);
                 add_items_to_menu(*qsubmenu, parent, submenu->items());
 
+                if (submenu->render_group_icon())
+                    qsubmenu->setIcon(create_tvg_icon_with_theme_colors("folder", parent.palette()));
+
                 menu.addMenu(qsubmenu);
             },
             [&](WebView::Separator) {

UI/Qt/ladybird.qrc

@@ -3,6 +3,7 @@
         <file>../Icons/ladybird.png</file>
         <file>../Icons/back.tvg</file>
         <file>../Icons/close.tvg</file>
+        <file>../Icons/folder.tvg</file>
         <file>../Icons/forward.tvg</file>
         <file>../Icons/hamburger.tvg</file>
         <file>../Icons/new_tab.tvg</file>