update level toc code to fix parse error on toc item
update level toc code to fix parse error on toc item

FBRTMaka/ooi-ui,asascience-open/ooi-ui,FBRTMaka/ooi-ui,Bobfrat/ooi-ui,asascience-open/ooi-ui,Bobfrat/ooi-ui,maka-io/ooi-ui,maka-io/ooi-ui,maka-io/ooi-ui,FBRTMaka/ooi-ui,Bobfrat/ooi-ui,asascience-open/ooi-ui