w2util.js: menu: display icons for menu-radio/menu-check
w2util.js: menu: display icons for menu-radio/menu-check

Display both checkboxes AND icons on menus.
See “Menu: Check” and “Menu: Radio” in test/toolbar.html

ceedriic/w2ui,ceedriic/w2ui,ceedriic/w2ui,ceedriic/w2ui,ceedriic/w2ui,ceedriic/w2ui,ceedriic/w2ui