Arisa posts regular `duplicate` instead of `duplicate-wai` message

[violine1101]

The Bug

When the parent ticket is resolved as WAI, Arisa should post the duplicate-wai message and not duplicate.

Example Tickets

• https://bugs.mojang.com/browse/MCPE-167323
• https://bugs.mojang.com/browse/MCPE-167522

[MikeUnverferth]

Also seems to apply to duplicate-forward, duplicate-invalid, etc