feat: AA-1138: Adds in Weekly Goal Celebration Modal (#797)

The logic to show the modal is controlled by the backend.
Displays the modal only in courseware the first time the learner
hits their weekly learning goal. After viewing the goal, the
database row is updated to not show the modal again.

Also updates first section celebration to use the StandardModal
component as the Modal component has been deprecated.

src/courseware/data/api.js

@@ -198,7 +198,7 @@ function normalizeMetadata(metadata) {
     accessExpiration: camelCaseObject(data.access_expiration),
     canShowUpgradeSock: data.can_show_upgrade_sock,
     contentTypeGatingEnabled: data.content_type_gating_enabled,
-    courseGoals: data.course_goals,
+    courseGoals: camelCaseObject(data.course_goals),
     id: data.id,
     title: data.name,
     number: data.number,