Prerequisites

• Are you running the latest version?
• Are you able to consistently reproduce the issue?
• Did you search the issue queue for existing issue?

Issue Description

The description field is missing in the input schema when you are creating a shop. It's defined in the graphql schema but not in the validation schema. So, if you create a shop with description,

1. Enter /p/38143c0c-c9b0-448c-93cd-60eb90d8da57/aspesi-shirt-h805-white
2. Change size
3. See the error

We still have a lot of places where we use this email, the most critical one is probably sample data that populate the sandbox (and the demo?)

Describe the bug
On SfModal in Storybook: when clicking on 'hello' button 'no preview' message shows

How to reproduce
Go to SfModal on Storybook and click on 'hello' button.

Expected behavior
Clicking on button should have no effect or should show alert on the screen.

Screenshots
![image](https://user-images.githubusercontent.com/32042425/94204184-156f9980-fec1-11ea-

Improve the tier prices feature - add info like "Buy 2 in x.xx$ and save x%"

Type: minor

Describe the bug
After adding a new account address, the screen goes blank you appear to be logged out, but when you refresh the page, the address is there and you are still logged in.

To Reproduce
Steps to reproduce the behavior:

1. Go to storefront
2. Log in
3. Click user name in upper right > Profile
4. Add a new address.
5. When you submit the form, see the