Checkboxradio: add visual focus outline to checkbox and radio buttons

This adds a focus outline matching that roughly from chrome osx
Build: Remove .DS_Store file
Checkboxradio: remove ui-state-active in destroy
Checkboxradio: Properly label unit test link for checkboxradio
Button: updated options in visual tests and removed checkbox and

radio button inputs since these no longer use button widget
Button: Fix vertical position of icon when font size has been changed
Checkboxradio: fix csslint issues
Button: fix incorrect option name in demo