Subscriptions improvements

Wondering if there is a better thread to add sub improvements to? I know there is this one:

but all the changes in the above will require significant work.

In the meantime there are a number of smaller (?) tweaks(?) which might make subs easier for hubs to use:

  1. Allow customers to modify orders while OC is still open by being able to ADD to their product list as well as remove items. This will means that customers can top up their weekly shopping but the hub is not penalised by Stripe/Paypal by incurring the fixed transaction fee twice
  2. Allow hubs to be able to edit the schedule a subscription is attached to. Other details can be changed, but this can’t. It would mean if a customer decides they want their order bi monthly rather than monthly then the hub can just ca