* Updating ModalContent styles and padding to allow for dynamic resizing of content that allows scrolling within the modal. This commit also updates the AccountListMenu so the account list can resize dynamically to take up all screen space available
* Updating the scroll bar styles from default for the ModalContent component so the scrollbar is thinner and more sleek
* Adding ModalContent component
* Using different component api for ref
* use imperative handle
* Updating size
* Updating stories and docs as well as component api
* Fixing import
