Ability to remember Workflow selection choice

[seanmiller26]

From this Talk thread: https://www.zooniverse.org/projects/cobalt-lensing/black-hole-hunters/talk/4564/3371395

Should we add a small checkbox which would "Remember my selection"? This could be especially useful in projects like Black Hole Hunters which has a Training Workflow. Once you complete the training, you wouldn't need to do that Workflow again.

[eatyourgreens]

I’ve opened #6216 to remember your workflow selection in a browser session cookie.

Here’s a short video of how that looks on a project with two workflows.
#6216 (comment)