Fixed another issue with the delete key on gecko that came up with the previous fix.
Fixed another issue with the delete key on gecko that came up with the previous fix.

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