am b4d2e42a: docs: revise menu guide to focus more on using menu resources...
am b4d2e42a: docs: revise menu guide to focus more on using menu resources instead of defining menus in code. And revise some style.
Merge commit 'b4d2e42a' into gingerbread
* commit 'b4d2e42a':
docs: revise menu guide to focus more on using menu resources