Prop 643: Partial refund - pools created post-v19

Requesting 13500 OSMO to facilitate user refunds of 900 osmo for all <15> pools created between the time of the increase and the start of discussion to officialize that change. Funds will go to Support Lab DAO wallet, to be dispersed by multisend. Discussion and details here -- https://forum.osmosis.zone/t/reimburse-900-osmo-to-any-recent-pool-creators/370