Fix/sidebar modal

[ChrisKnightLDN]

What does this change? Fixes sidebar Modal

Why? It was broken after modal component update

How? Uses store for isOpen

Related issues:

Does this introduce new dependencies? no

How is it tested?

How is it documented?

Are light and dark themes considered?

Is it complete? Y

• [x ] Have you included changeset file?
• [ ] If this adds a new component, is it exported via index.js?