Revert change where NULL config value wasn't handled as unset (#1489202)

Aleksander Machniak

2013-06-24 2787fbe5b6f015b5ce7c86185cc6876ec892b483

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.panel_wrapper div.current { 
    height: 290px; 
} 
 
#id, #style, #title, #dir, #hreflang, #lang, #classlist, #tabindex, #accesskey { 
    width: 200px; 
} 
 
#events_panel input { 
    width: 200px; 
}