add logic so that valid a tags are not stripped by WordFilter
add logic so that valid a tags are not stripped by WordFilter

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