Add option to redirect to current path

I cleaned up the redirect fieldset a little bit by adding a Redirect to radio group. I wrote an update hook to migrate existing views.

Tested the MR on 2.x-dev and it works great for me.

redwan jamous → made their first commit to this issue’s fork.

HTTP_REFERER will be empty if the display link was accessed directly, in that case we would want to fallback to front page.
I updated the MR to handle this case.
Attaching a static patch file to use with composer...

Tested on core 10.4.1 with views_data_export 8.x-1.5 using merge request .diff in patches section of composer managed site. The Merge request applied cleanly and I now see 4 options for "Redirect to" under "Redirect Settings".

Active display
Other display
Custom path
Front page

Active display does keep you on the same url once batch completes.
Other display and Custom path seem to function as before.
Front page does indeed redirect you back to the front page of site.

I feel like Drupal should be able to generate a link with the destination parameter set? It does this a lot for other links etc. and I think that would be better than fetching the referrer header, which isn't even set by some browsers.

Is there a reason I'm missing why we're not using the destination parameter?

Also, we need some tests for these changes.