Bugs/fix account switcher with single project or account

[aneyzberg]

Description

Motivation and Context

How Has This Been Tested?

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [x] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[aneyzberg]

This PR allows for the state in which a the Project/Account Switcher does not show a Flyout given there is either only one project or account available.

[shannonwells]

👍

[aneyzberg]

completes #249