Fixed the challenge page including pop up.

package-lock.json

package.json

src/components/challenge/ActiveChallengeDisplay.vue

src/components/challenge/CompleteChallengePopUp.vue

src/components/challenge/PotentialChallengeDisplay.vue

src/utils/MilestoneUtils.ts

src/utils/challengeutils.ts

src/views/HomePage/ChallengeView.vue