MOBI-931 FlipSwitch disabled attribute does not work
- do not render onclick js if disabled="true"
- add disabled style class
- clean up code
- render "disabled='disabled'" on the hidden field, rather than the <a> tag

git-svn-id: http://anonsvn.icesoft.org/repo/icemobile/trunk/icemobile@38730 1de00972-ac04-4911-a46b-06793c8d78d9