Handle Short bots

[coltoneshaw]

Is your feature request related to a problem? Please describe.
Right now the application does not by default handle how a short bot functions. This is because the short bot's currency is held in the crypto pair itself while taking profits in quote or base. This creates a skewed risk metric within the app if you're running a large amount of short bots.

Describe the solution you'd like
Allow the user to select what bankroll? or similar within the app. This would allow selecting bankroll to be your total portfolio value or the filtered quote value.

Additional Context

Would need to also evaluate how the bankroll as a whole is handled here. Right now it's bankroll + bought volume which allows for a consistent bankroll during crypto dips. This was put in place to show people true risk based on their bankroll, assuming they didn't close positions at a loss.

If we use the portfolio value then the risk position will slowly creep up as more funds are used and portfolio value slowly drops. This needs to be considered when using portfolio value.