RunWindow: Center FilePicker window within the entire screen

It doesn't make much sense since to center run window within the parent
window since it's created in the bottom left corner of the screen.

Userland/Applications/Run/RunWindow.cpp

@@ -62,7 +62,7 @@ RunWindow::RunWindow()
 
     m_browse_button = *find_descendant_of_type_named<GUI::Button>("browse_button");
     m_browse_button->on_click = [this](auto) {
-        Optional<String> path = GUI::FilePicker::get_open_filepath(this);
+        Optional<String> path = GUI::FilePicker::get_open_filepath(this, {}, Core::StandardPaths::home_directory(), false, GUI::Dialog::ScreenPosition::Center);
         if (path.has_value())
             m_path_combo_box->set_text(path.value().view());
     };