implemented the leave mission actions and styled the buttons

[EddyShimwa]

At this step I,

• Implemented the leave-missions actions
• I also style those buttons according to the design mockup
• I also used react conditionals so that for the user has joined already should show a badge "Active Member" instead of the default "NOT A MEMBER" and a button "Leave Mission" instead of the "Join Mission" button (as per design).

[billymohajeri]

Hi @EddyShimwa

Your project is complete! There is nothing else to say other than... it's time to merge it :shipit: Congratulations! 🎉

Highlights

1. No Linters errors 👍
2. All requirements are complete 👍

Optional suggestions

No optional suggestions

Every comment with the [OPTIONAL] prefix won't stop the approval of this PR. However, I strongly recommend you take them into account as they can make your code better. Some of them were simply missed by the previous reviewer and addressing them will really improve your application.

Cheers and Happy coding!👏👏👏

Feel free to leave any questions or comments in the PR thread if something is not 100% clear. Please, remember to tag me in your question so I can receive the notification.