Present edit immediately to user if only single image uploaded [WHIT-2718]
#10862
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What
If a user has only uploaded one file (that requires a crop) then proceed immediately to the edit screen instead of returning the user to the index to wait for the files to load.
Why
Since only one image is uploaded, it makes sense to present to the user the edit screen of the image they've just uploaded. This also makes it possible to implement flows in which only one image is allowed to be uploaded (such as a lead images).
This application is owned by the Whitehall Experience team. Please let us know in #govuk-whitehall-experience-tech when you raise any PRs.
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