Add Most Wanted Features entries for <dialog>
Add Most Wanted Features entries for <dialog>

Ports 0b21f2ecb1e5a3a8978cc23fa984242e9f81c62c to v3

Refs https://bugzil.la/840640
Refs https://webkit.org/b/84635

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LimetecBiotechnologies/bootstrap,seoulstore/ssss,panvagil/bootstrap,KM-MFG/bootstrap,patrickhlauke/bootstrap,seoulstore/ssss,hbrls/bootstrap,FernandezR/bootstrap,hbrls/bootstrap,mosoft521/bootstrap,justincron/bootstrap,LuoSpark/bootstrap,scjang/ssss,monoblaine/bootstrap,the-open-university/ouice-bootstrap,KM-MFG/bootstrap,devsong/bootstrap,justincron/bootstrap,Softdocs/bootstrap,JobsUnited/bootstrap,algolia/bootstrap,nanuclickity/bootstrap,hiersekornc/bootstrap,aoimedia/bootstrap,OneZenD/gr8alpha,FernandezR/bootstrap,bo01ean/bootstrap,292388900/bootstrap-1,mosoft521/bootstrap,patrickhlauke/bootstrap,LimetecBiotechnologies/bootstrap,mosoft521/bootstrap,GerHobbelt/bootstrap,LuoSpark/bootstrap,stone2310/bootstrap,mdo/bootstrap,RanHoNg/bootstrap,JobsUnited/bootstrap,OneZenD/gr8alpha,antonaavik/bootstrap,RanHoNg/bootstrap,FernandezR/bootstrap,OneZenD/gr8alpha,michael-brade/bootstrap,OneZenD/gr8alpha,mdo/bootstrap,scjang/ssss,seoulstore/ssss,Softdocs/bootstrap,gencer/bootstrap,panvagil/bootstrap,seoulstore/ssss,df2k2/bootstrap,gencer/bootstrap,scjang/ssss,algolia/bootstrap,GerHobbelt/bootstrap,aoimedia/bootstrap,LuoSpark/bootstrap,df2k2/bootstrap,bo01ean/bootstrap,bkrukowski/bootstrap,Jazzo/bootstrap,panvagil/bootstrap,bkrukowski/bootstrap,nanuclickity/bootstrap,michael-brade/bootstrap,aoimedia/bootstrap,michael-brade/bootstrap,justincron/bootstrap,292388900/bootstrap-1,df2k2/bootstrap,nanuclickity/bootstrap,hbrls/bootstrap,stone2310/bootstrap,monoblaine/bootstrap,LimetecBiotechnologies/bootstrap,the-open-university/ouice-bootstrap,Softdocs/bootstrap,scjang/ssss,patrickhlauke/bootstrap,Jazzo/bootstrap,hiersekornc/bootstrap,JobsUnited/bootstrap,antonaavik/bootstrap,monoblaine/bootstrap,antonaavik/bootstrap,mdo/bootstrap,the-open-university/ouice-bootstrap,FernandezR/bootstrap,RanHoNg/bootstrap,KM-MFG/bootstrap,df2k2/bootstrap,hiersekornc/bootstrap,stone2310/bootstrap,devsong/bootstrap,bo01ean/bootstrap,Jazzo/bootstrap,devsong/bootstrap,antonaavik/bootstrap,GerHobbelt/bootstrap,algolia/bootstrap,justincron/bootstrap,hbrls/bootstrap,gencer/bootstrap,hiersekornc/bootstrap