Feature Request: allow multiple people to pay

[whirlfire]

I want to

have multiple people paying. Example: 70 Euro Total

Person 1 pays 5 Person 2 pays 65

Split equally

This is also possible in Splitwise.

At the moment, only one person can be selected as payer.

Real-World example 1: Person 1 pays the bill with card Person 2 pays the tip in cash

Real-World example 2: Person 1 and person 2 pay together with whatever cash they currently have at hand, but want to split equally or in another way.