DOJO(mentor/page): List mentor submitted exercises

[flacial]

This page will list all the mentor's submitted exercises, with the ability to edit and delete them.

Here's the page mock

The page's states:

• When a new question is added
• When a question is deleted

Here are the components that you'll have to make before building the page:

• Mentor problem card
• Filter by module dropdown (could be generic)
  • Here's the filter by module dropdown onClick event design

There are a few things missing from the Mentor problem card:

• Top 3 wrong answers
• Correct out of total ratio
• The card design on Edit state

We already created a card that has these things (https://www.figma.com/file/f9xRyl1bJOjtBRd8zFORzg/c0d3?node-id=311%3A2314) but for some reason a new one that doesn't have them was created in the last design meeting. Feel free to discuss it with the engineers or the designer.

Notes:
- @SlyBouhafs is working on #1975 which is a subpage for this page.

[evo777]

This is a good idea.

[flacial]

Things to add:

1. Create a query to get all the mentor's created exercises based on the user ID
1. Modify the exercise card to not show ANSWERED or NOT ANSWERED states
1. Add a back button to the addExercise page

[flacial]

4. Make NavBar references DRY for the curriculum pages.

[flacial]

• Add filtering box
• Add edit/delete functionalities