[CHE-130] Add Edit Functionality To Threads

[brok3turtl3]

Description

As part of the CHE-110 story, this PR adds edit functionally to the thread topics for the originating user.

• Future tickets to move some of the display logic to individual components as well as migration to redux state to follow.

Jira Task

CHE-130

Testing Instructions

1. Ensure branches are up to date.
2. Make sure that you have edit permissions for any threads for the user you are on. Make sure that any edits you make are immediately reflected in the forums.

Checklist

All Team Members

• I added a descriptive title to this PR.
• I filled out the Description, Jira Task, and Testing Instructions sections above.
• I added or updated [Jest unit tests]for any changes to components, server-side controllers, etc.
• I ran npm run docker-test in my local environment to check that this PR passes all unit tests.
• I did a quick check to make sure my code changes follow the recomended style guide.

Additional Notes, Images, etc.

N/A

[serenahromano]

looks good :)