The color editor factory example is removed and part of the codes are
used as snippets.
Fixes: QTBUG-119985
Pick-to: 6.6
Change-Id: I421e473e7db09a5af7543b80b87a338d8ff2ab7e
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
(cherry picked from commit 4e1a1f3697563124588d7d00089b15084220ca42)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
869e46613d