Userland: Let applications make use of make_command_palette_action()

Author: https://github.com/demostanis
Commit: 34acae90c7
Pull-request: https://github.com/SerenityOS/serenity/pull/15596
Reviewed-by: https://github.com/alimpfard
Reviewed-by: https://github.com/linusg

Userland/Applications/Spreadsheet/SpreadsheetWidget.cpp

@@ -279,6 +279,8 @@ SpreadsheetWidget::SpreadsheetWidget(GUI::Window& parent_window, NonnullRefPtrVe
         },
         window());
 
+    m_search_action = GUI::CommonActions::make_command_palette_action(&parent_window);
+
     m_about_action = GUI::CommonActions::make_about_action("Spreadsheet", GUI::Icon::default_icon("app-spreadsheet"sv), &parent_window);
 
     toolbar.add_action(*m_new_action);
@@ -664,6 +666,7 @@ void SpreadsheetWidget::initialize_menubar(GUI::Window& window)
     edit_menu.add_action(*m_insert_emoji_action);
 
     auto& help_menu = window.add_menu("&Help");
+    help_menu.add_action(*m_search_action);
     help_menu.add_action(*m_functions_help_action);
     help_menu.add_action(*m_about_action);
 }