[Add Duplicate Board tooltip, and remove adding text "Copy" to duplicated board](https://github.com/wekan/wekan/commit/0f15b6d1982c383f76e8411cb501ff27e8febd42).
[Add Duplicate Board tooltip, and remove adding text "Copy" to duplicated board](https://github.com/wekan/wekan/commit/0f15b6d1982c383f76e8411cb501ff27e8febd42).

Thanks to xet7 !

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