[24.2] Build collection only if populated in collection builder

[ahmedhamidawan]

Fixes #19243

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. Have a workflow input which creates a collection (list for e.g.)
  2. Click on the plus icon next to the form input
  3. Collection builder will open, try giving it a name and saving
  4. A confirmation dialog opens up that gives you the choice of creating an empty collection if that's what you want
  5. Clicking create will create it, cancel will take you back

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[jmchilton]

I was sort of hoping for a warning like "are you sure you want to do this" but then still allow it - like I said in the issue I think it should technically be possible. There are I think valid potential use cases for empty lists - like say you had a workflow that processed some data and then excluded intermediate steps if they matched some criteria defined by a list - in that case you might want an empty list to supply to the workflow.

[ahmedhamidawan]

@jmchilton Interesting, I wasn't aware of such use cases. Absolutely, we can add a link in those alerts use a confirmation dialog that will still allow creating the empty collection.

[ahmedhamidawan]

@jmchilton I have added a confirmation dialog that still allows empty collection creation if that's what the user wants; the GIF above has the latest changes

[jmchilton]

Wonderful - thank you so much - I really appreciate the work!