fix bug 937671, 948452, 923272 - Ensure dropdown / submenus display on small screens
fix bug 948439 - add HTML5 and CSS3 links
Merge pull request #1748 from groovecoder/buzzwords-bingo-948439

fix bug 948439 - add HTML5 and CSS3 links
Merge pull request #1746 from darkwing/submenu-mobiles-position

fix bug 937671, 948452, 923272 - Ensure dropdown / submenus display on small screens