* Add empty state for invoices
* Make cards on create client dialog tabbable
* Add space in $ / month per member
* Mute text, remove (Monthly) and right align menu on clients table
* Made used seats account for all users and fixed column sort for used/remaining
* Resize pricing cards
* Rename assignedSeats to occupiedSeats
* Added select-payment-method.component in shared lib
Because we're going to be implementing the same functionality for providers and orgs/users, I wanted to start moving some of this shared functionality into libs so it can be accessed in both web and bit-web. Additionally, the Stripe and Braintree functionality has been moved into their own services for more central management.
* Added generalized manage-tax-information component to shared lib
* Added generalized add-account-credit-dialog component to shared libs
* Added generalized verify-bank-account component to shared libs
* Added dialog for selection of provider payment method
* Added provider-payment-method component
* Added provider-payment-method component to provider layout
