This commit adds a new step 'Users' that is enabled only in stage-preview,
and will enable it in stage-stable once IQE tests are ready.
The step is not functional yet, this is just the first step.
There was a disabled Details test in CreateImageWizard.test.tsx, this moves the test to Details.test.tsx, updates it and enables it again.
The re-enabled tests are checking maximum length of image name and description.
This adds tests to check that the revisit buttons on the Review step are working correctly.
Also some minor cleanup, namely making case used in the names of describe and test more consistent and moving render functions outside of functions selecting targets to make the structure easier to go through.
