Copyediting and linking
Adds this month to the level 4 warning tooltip and links extended-confirmed to https://en.wikipedia.org/wiki/Wikipedia:User_access_levels#Extendedconfirmed per the same rationale as linking U2
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Adds this month to the level 4 warning tooltip and links extended-confirmed to https://en.wikipedia.org/wiki/Wikipedia:User_access_levels#Extendedconfirmed per the same rationale as linking U2