Well, two seconds is just a guess. Ideally the page wouldn't display
until we have everything loaded. But this logic will be replaced when we
chuck out AngularJS.
This version passed over 100 runs with a busy CPU on my machine.
Note, this doesn't test checking/unchecking some distributor shipping methods and not others because that is tested in order_cycles/complex_creating_time_specific_spec.rb.
Before if a shipping method was shared between multiple distributors it could only be disabled/enabled on that order cycle for all the distributors which have that shipping method e.g. you couldn't select that shipping method for one distributor but disable it for another.
The spec was failing from time to time. I hope that this will fix it.
```
Failures:
1)
As an administrator
I want to create/update complex order cycles with a specific time
creating an order cycle with full interface
Failure/Error: fill_in 'order_cycle_outgoing_exchange_0_pickup_time', with: 'pickup time'
Capybara::ElementNotFound:
Unable to find field "order_cycle_outgoing_exchange_0_pickup_time" that is not disabled
# ./spec/system/admin/order_cycles/complex_creating_specific_time_spec.rb:138:in `add_distributor_with_fees'
# ./spec/system/admin/order_cycles/complex_creating_specific_time_spec.rb:66:in `block (2 levels) in <main>'
# ./spec/system/support/cuprite_setup.rb:39:in `block (2 levels) in <main>'
# -e:1:in `<main>'
```
It's a clearer name because 'preferred' implies there could be other unpreferred shipping methods available as well.
Co-authored-by: Maikel <maikel@email.org.au>
