Fixed ListBox loop bug and check for menus set to null.
Fixed ListBox loop bug and check for menus set to null.

nbcp/tinymce,tinymce/tinymce,henrythewasp/tinymce,blakewallan/tinymce,support-dot-com/tinymce,kencheung/tinymce,sachgits/tinymce,sachgits/tinymce,dziemian007/tinymce,1099511627776/tinymce,jtark/tinymce,danielpunkass/tinymce,ikuchmin/tinymce,nikolas/tinymce,ChristophKaser/tinymce,MediehusetTek/tinymce,rednose-public/tinymce,adaptiffdesigns/tinymce,danielpunkass/tinymce,tinymce/tinymce,VioletLife/tinymce,ice8lue/tinymce,danchr/tinymce,VioletLife/tinymce,shilpi230/tinymce,enfold/tinymce,Razzwan/tinymce,Zimbra/tinymce,fhchina/tinymce,gabixdev/tinymce,simachewh/tinymce,endjin/tinymce,rxl194/tinymce,rednose-public/tinymce,TeamupCom/tinymce,nikolas/tinymce,M4R7iNP/tinymce,fillabs/TinySpecMCE,aduth/tinymce,shilpi230/tinymce,ChristophKaser/tinymce,Kindling/tinymce,rbecheras/tinymce,howanghk/tinymce,dziemian007/tinymce,gencer/tinymce,howanghk/tinymce,gabixdev/tinymce,leofeyer/tinymce,fashionsun/tinymce,M4R7iNP/tinymce,FernCreek/tinymce,FernCreek/tinymce,endjin/tinymce,leofeyer/tinymce,Kindling/tinymce,TeamupCom/tinymce,danielpunkass/tinymce,pmpl-5/tinymce,fhchina/tinymce,Razzwan/tinymce,bsuh/tinymce,enfold/tinymce,support-dot-com/tinymce,sjbufton/tinymce,adaptiffdesigns/tinymce,1099511627776/tinymce,kencheung/tinymce,fillabs/TinySpecMCE,sjbufton/tinymce,nbcp/tinymce,gencer/tinymce,Zimbra/tinymce,simachewh/tinymce,ETSI-CTI/TinySpecMCE,henrythewasp/tinymce,Shopify/tinymce,pmpl-5/tinymce,bsuh/tinymce,blakewallan/tinymce,ikuchmin/tinymce,FernCreek/tinymce,rbecheras/tinymce,aduth/tinymce,rxl194/tinymce,tinymce/tinymce,jashua212/tinymce,ETSI-CTI/TinySpecMCE,MediehusetTek/tinymce,ice8lue/tinymce,jtark/tinymce,danchr/tinymce,jashua212/tinymce,fashionsun/tinymce