Follow-up from "update octez-baker dependencies and remove octez-dal-zcash params"

The following discussion from !16547 (merged) should be addressed:

• @NicVolanschi started a discussion: (+1 comment)

  I also think this 2-pages dialog is confusing:

  

  

  I see several issues here:

  1. It's not at all clear that the first page is for choosing the binary of the baker-active service, while the second page is for choosing the baker-next page
  2. The first phrase is not identical in the two pages but seems to tell the same thing. If the intention is to convey the same message in the first phrase, use identical text without rephrasing
  3. How can one leave the field empty in the second page?