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It was only showing the "last" one because the inames were the same
(currentIName.None).
Do not overwrite iname of sub item in 'enterSubItem' if it already was
set.

Task-number: QTCREATORBUG-11109
Change-Id: I74581f62d47ff0c33650769c3ed66e24124d1092
Reviewed-by: hjk <hjk121@nokiamail.com>