Wire transfer payments for events

One-sentence description

Wire transfer payments cannot be added to events

Current behaviour / Reproducing the bug

There is only the possibility to add pin or cash payments to events. Sometimes however a wire transfer payment would be nice. Currently there is a workaround by changing the radio bullet value to wire_payment but this is a bit hacky and ugly.

Expected behaviour

Some way to do this without changing the radio bullet value to wire_payment manually. By the way, there is no need to necessarily make this a separate checkbox, since it won't be used that often and probably only by board members (me). So it is no problem (and maybe even better) to put it somewhere hidden, such as when changing/adding a registration manually (in the edit registration page).