Voting module improvements

[Kimossab]

Follow-up on https://github.com/Kimossab/kimoo-disc-bot/issues/40

• Add a flag to allow other users to add options if the creator wants
• Add a settings button that will send a new message just to the creator
  • it should allow to see who voted in what
  • move the add option here
  • remove options
  • reset the poll
  • close the poll
• Add a refresh button (if I can't update the original with a followup message, need further investigation)