Fixed so the end_container_on_empty_block option handles any container block type.
Fixed so the end_container_on_empty_block option handles any container block type.

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