Suggestions

Accept /trade by clicking on it

Take the following message that appears when someone wants to /trade with you.
[Player] wants to trade with you. Use /trade accept to accept!

Make it so you can accept by clicking on the "/trade accept" part
(like when you get mail and you can click on "/mail read"
instead of typing it)

Voteparty

I noticed that VoteParty starts counting again after Slimefun resets (I don't know if that affects other gamemodes too).
Example: Before gamemode resets there were 80 votes remaining for voteparty. After Slimefun resetted, voteparty started again from 150

I suggest that voteparty should not start again, and instead continue counting until the last vote.