Fixed more IE issues with the ForceBlocks.js logic.
Fixed more IE issues with the ForceBlocks.js logic.

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