GitLab Migration - Confusing message informing the user that group name needs to be changed for re-import

From https://gitlab.com/gitlab-org/manage/import/discussions/-/issues/30#note_1185250043

Problem

After the import has finished, on the Import groups from GitLab page in the row of imported group the user can see a Import is finished. Pick another name for re-import message written in red and the border around the group name text field is also red. This is misleading, user might think there was an error and the import failed.

Proposed solution

• When import is finished, no error message is shown and dropdown/input are disabled (user cannot re-import).
• When user clicks Re-import, the dropdown/input are enabled and we trigger validation and show warning message "This name has already been taken. Pick another name for re-import."