Rentals are ended where there could be fees to be claimed

[gioenn]

When a rental is terminated, function createLease allows to opportunistically create a new rental (for the same listing) and an event RentEnds is emitted which so far indicates also fees are completely claimed which could not be the case.

https://github.com/rentable-world/rentable-protocol/blob/694d4b1f3546d8b0a80904bcaedeca2d64eeac62/contracts/Rentable.sol#L211-L230

Possible solutions

1. At protocol level automatically send the remaining fees to the owner of the yToken and then propagate the event
2. At subgraph level avoid setting availableToClaim to 0 in handleRentEnds (see: https://github.com/rentable-world/rentable-subgraph/blob/e47633efa4dda86a70b972b5e3ae2790f9e4a4ae/src/mappings.ts#L136-L145)

Impact on users

Rentals with available fees to be claimed are not shown in the rentals list if a new rental for the same listing is created. This prevents user to claim these fees through the frontend (they should make a direct call to the smart contract).