Cleaned up the EventDispatcher.js once handling so it doesn't mutate the callback function directly.
Cleaned up the EventDispatcher.js once handling so it doesn't mutate the callback function directly.

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