Themes: uploading existing theme should point to the theme details

[folletto]

If a user uploads a theme already uploaded we should either:

1. Forward the user to the theme sheet
2. Ask if the user wants to overwrite

Ideally I think the second would be better, or at least an option asking between these two options above. In the meantime however would be nice if we could just:

1. Show a yellow message saying "The theme already exist [ show details ]" and the show details button leads to the theme sheet.
2. Just redirect to the theme sheet (maybe too abrupt?)

In the future we should show a message (either dialog or in-page) asking the user if they mean to over-write the theme, or just see the details.

/cc @rickybanister

[stale]

This issue has been marked as stale because it hasn't been updated in a while. It will be closed in a week.
If you would like it to remain open, can you please you comment below and see what you can do to get things moving with this issue?
Thanks! 🙏

[folletto]

Still an important UX improvement.

[worldomonation]

Hi! I'm performing triage on older bugs as part of Quality Squad's efforts to cut down on backlog issue counts.

For reference, this is how the UI currently looks like:

With that said, as there as not been any activity on this issue in 3 years, I am proposing that this issue be closed until work is tabled and scoped.