closes#108
- fields for receivers of allowance `a` and subsidies `s` are not compulsory anymore. If receivers are given, `a` and `s` are payed out for them. `s` can only be payed out in total, disregarding the number of receivers given for `a`.
- In the overview pages (activity and statement), we are now distinguishing between theoretical `a` + `s` and what has been payed out practically. If no receiver was given for either things, it is made clear that nothing is payed out. All combinations of `0`, ..., `n` payed allowances (`n` being number of approved participating YLs) and `0, `1` payed subsidies are possible.
- transaction generation logic adapted accordingly
Reviewed-on: #112
Reviewed-by: Christian Merten <christian@merten.dev>
Co-authored-by: marius.klein <marius.klein@alpenverein-heidelberg.de>
Co-committed-by: marius.klein <marius.klein@alpenverein-heidelberg.de>