[#132637] Fix behavior of cancel on merge order reservation (#829)
[#132637] Fix behavior of cancel on merge order reservation (#829)

When adding a reservation to an existing order (i.e. by facility
staff), the “Cancel” button was not returning you to the expected
location and was instead causing an error.

`orders#remove (RuntimeError) "Can't modify frozen hash”`
tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open,tablexi/nucore-open