[apps/code] Handle Home event when in the toolbox

If editing a script, the empty space at the end of the script should be
moved to the end of the storage.

apps/code/menu_controller.cpp

@@ -156,6 +156,10 @@ void MenuController::scriptContentEditionDidFinish() {
   reloadConsole();
 }
 
+void MenuController::willExitApp() {
+  m_editorController.willExitApp();
+}
+
 int MenuController::numberOfRows() const {
   return m_scriptStore->numberOfScripts() + m_shouldDisplayAddScriptRow;
 }