[Feature]: Make relative return reward include losses

[JonRay15]

Feature Overview

In order to improve the current games functionality
We will look into these hopefully "quick fixes"
So that people find the games more engaging

Tasks

• Adjust the relativeReturn reward type so that instead of disregarding any key with a loss we rank ALL eligible keys in terms of P&L and reward them. This would allow the game to account for the situation where the market turns and everyone is losing, but some are losing "better" than others.
  • For a pro rata game this would mean rewarding all eligible keys some amount
  • For a ranked game this would mean that keys in loss can still be in the ranking table

Feature test scenarios

Detailed scenarios that can be executed as feature tests to verify that the feature has been implemented as expected.

GIVEN (setup/context)
WHEN (action)
THEN (assertion) For example...
See here for more format information and examples.

Additional Details (optional)

Any additional information that provides context or gives information that will help us develop the feature.