* Adding an index.js file for user-messages.
Importing from the module, not its contents.
* Allowing customProps to be passed though AlertList to Alerts.
* UserMessagesProvider can create flash messages.
A flash message is one that will be displayed on the next reload of the page. UserMessagesProvider now provides a “addFlash” function. These messages are stored in localStorage and displayed the next time UserMessagesProvider is mounted, which is generally going to be on the next page refresh.
Once displayed, flash messages are cleared out of localStorage.
* Hooking up Enroll Now button and adding “success” alert.
Success alert is shown as a flash message on next page reload.
* Using ALERT_TYPES constants.
See details in code, but this causes UserMessagesProvider to always use the most “recent” version of its messages and nextId state when its callbacks are called.
* build: bumping version of frontend-platform
We’re going to need to use the new getLoginRedirectUrl helper.
* Adding custom alerts for anonymous and unenrolled users.
- Anonymous users are prompted to sign in or register.
- Unenrolled users are prompted to enroll.
The alerts themselves are lazy-loaded as necessary, like the ContentLock component.
This PR also adds `customAlerts` to the AlertList, allowing an application to specify custom components to be shown as Alerts for a given alert code.
* refactor: Renaming enrollmentIsActive to isEnrolled
As per review feedback that the former wasn’t clear.
