Added feature detection for IE 11 and missing selection object.
Added feature detection for IE 11 and missing selection object.

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