Update core/model/modx/modresource.class.php
Feature 8558: option to duplicate alias and menuindex when duplicating contexts
fix translation
Merge branch 'patch-6' of git://github.com/eprochasson/revolution into eprochasson-8558
Add changelog entry
Preserve menuindex/alias on Duplicate Context

closes #8195, #8558, #8557

Merge branch 'eprochasson-8558' into develop

* eprochasson-8558:
  Add changelog entry
  fix translation
  Feature 8558: option to duplicate alias and menuindex when duplicating contexts
  Update core/model/modx/modresource.class.php