fix hover, action & CSS

* delegate() 'hover' to 'mouseenter mouseleave'
* add toggleClass('ui-state-hover') into cwd items
* correction CSS
fix hover, action & CSS

* delegate() 'hover' to 'mouseenter mouseleave'
* add toggleClass('ui-state-hover') into cwd items
* correction CSS
Merge pull request #807 from nao-pon/fix_hover

Fix hover