Subscriptions page: rewrite to use tabs instead of 2 tables

[smirolo]

• rewrite to use tabs instead of 2 tables one under the other otherwise infinitescroll on first table does not permit to see past subscriptions.

• Use flex box instead of table (i.e. "card like" but one per row.)

• Add a "sort by" <select>.

• Move form to add subscription out of the table (broker manager)

• Align input box and button on mobile
  

• Add a link to the pricing page for a subscriber to add subscriptions (organization profile manager)

[knivets]

Add a link to the pricing page for a subscriber to add subscriptions (organization profile manager)

where should I add this?