Create Account and Log In tabs (GH-1329, GH-1330)

[zarembsky]

• [x ] Have you followed the guidelines in CONTRIBUTING.md?
• [x ] Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• [x ] Have you added an explanation of what your changes do?
• Does your submission pass tests?
• [ x] Did you lint your code prior to submission?

[IAmThePan]

@zarembsky I added a commit with:

• Updated comments across files,
• A new ExitButton in shared-components and I updated CreateAccountView and LogInView to use that instead of SetupNavigation__exitButton classes
• I renamed CreateAccountView.jsx -> CreateAccountViewContainer.jsx
• I renamed LogInView.jsx -> LogInViewContainer.jsx

Please update:

1. On the Home page, update Create Account link with the user's email address if the user is signed in.
2. In the Side Navigation, update the Create Account and Sign In links with the email address and Sign Out when the user is signed in.
   2a. Sign Out should work.
3. Upon successful login or registration, navigate the user to the Home page.
   3a. For Log In only (not create account) if the user has the justInstalled query parameter, remove it.
4. Move the complicated rendering out of CreateAccountViewContainer and LogInViewContainer and into new files: CreateAccountview and LogInView

Thanks

[IAmThePan]

Approved.

[jsignanini]

let's use this.props here for consistency.

[jsignanini]

let's write this as Object.assign({}, AccountActions, { setToast }), if we want all AccountActions functions. Otherwise, let's only import the required actions instead of all the AccountActions.

[jsignanini]

let's only import the function we need here, and not all the AccountActions.

[jsignanini]

same as above here

[jsignanini]

same here, let's only import the functions we are using.

[jsignanini]

same here, we can just import getUser