Cannot create password when invited to create account

[spencern]

Summary
When being invited to create an account as a shop manager or a merchant shop owner, the password overlay spinner is never turned off.

It appears that the lifecycle method componentWillReceiveProps is never fired for this password overlay.

https://github.com/reactioncommerce/reaction/blob/release-1.8.0/imports/plugins/core/accounts/client/components/updatePasswordOverlay.js#L33

As seen in the gif here: http://g.recordit.co/F9BwrqGl2g.gif, if you manually set the state for "showSpinner" to false, you are able to enter your password and complete creating your account.

Steps to reproduce

1. Use branch release-1.8.0
2. invite a user to become a shop manager from the accounts screen
3. Follow that link in a new session (incognito or similar)
4. Observer spinner
5. In react devtools find the Reaction(UpdatePasswordOverlay) component and set showSpinner` to false
6. Input your password and see that your account is created

[brent-hoover]

Closed via #3806