Ladybird: Fix context menus being in slightly the wrong position

Previously, we were doing mapToGlobal() via the Tab widget, but the
widget position was actually relative to the WebContentView. This
meant context menus appeared slightly vertically offset from where
you clicked.

Ladybird/Tab.cpp

@@ -221,7 +221,7 @@ Tab::Tab(BrowserWindow* window, StringView webdriver_content_ipc_path, WebView::
     m_page_context_menu->addAction(&m_window->inspect_dom_node_action());
 
     view().on_context_menu_request = [this](auto widget_position) {
-        auto screen_position = mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
+        auto screen_position = view().mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
         m_page_context_menu->exec(screen_position);
     };
 
@@ -254,7 +254,7 @@ Tab::Tab(BrowserWindow* window, StringView webdriver_content_ipc_path, WebView::
     view().on_link_context_menu_request = [this](auto const& url, auto widget_position) {
         m_link_context_menu_url = url;
 
-        auto screen_position = mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
+        auto screen_position = view().mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
         m_link_context_menu->exec(screen_position);
     };
 
@@ -308,7 +308,7 @@ Tab::Tab(BrowserWindow* window, StringView webdriver_content_ipc_path, WebView::
         m_image_context_menu_url = image_url;
         m_image_context_menu_bitmap = shareable_bitmap;
 
-        auto screen_position = mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
+        auto screen_position = view().mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
         m_image_context_menu->exec(screen_position);
     };
 
@@ -377,7 +377,7 @@ Tab::Tab(BrowserWindow* window, StringView webdriver_content_ipc_path, WebView::
         m_video_context_menu_controls_action->setChecked(has_user_agent_controls);
         m_video_context_menu_loop_action->setChecked(is_looping);
 
-        auto screen_position = mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
+        auto screen_position = view().mapToGlobal(QPoint { widget_position.x(), widget_position.y() });
         m_video_context_menu->exec(screen_position);
     };
 }