How do I add a dependent field on web clock?

Summary:

We want to add a dependent field called 'Project' for our web clock users so that once they hit the clock-in button, it will pop-up and ask them to choose from the list of projects. This would be similar to how someone adds a location after clocking in. How do I add this field?

Content (required):

We already have this field created and it is in the time entry layout. I just need to add it as a pop-up once someone hits the clock in button.

Version (include the version you are using, if applicable):

23B

Code Snippet (add any code snippets that support your topic, if applicable):