(Issue #3692) upgrade to font awesome 4.1
(Issue #3692) switch to Font Awesome 4 icons and syntax
(Issue #3692) fix icon color in buttons
(Issue #3692) increase specificity of styles to avoid being overridden by skin.css
(Issue #3692) remove unneeded javascript to hide spinner
(Issue #3692) fix spacing of large visibility icons
(Issue #3692) fix full-screen icons
(Issue #3692) treat large icons consistently
(Issue #3692) simplify icon selectors