Removal of unnecessary overrides of jquery-ui styles
    
    ipa.css had to be updated to work with updated jquery-ui. This patch removes several duplicate styles.
    
    Following issues were fixed:
     * dialogs titles in IE and Opera were black instead of green
     * no black line in first navigation level in IE and Opera
     * all browsers (FF, IE, Chrome, Opera) have the same style for buttons and headers
     * dialogs has borders again (should we remove its shadow?)
    
    Known issues:
     * selected tab-1 in Chrome and Opera doesn't overlaps background line as in IE and FF. Not sure how to fix without breaking (there are border overlaps) the latter ones. I think it looks good enough.
     * some buttons are missing padding. Will be fixed in next patch.
    
    https://fedorahosted.org/freeipa/ticket/2817