Fix #1167. Add Show All to Lang packs.

Show All was requested to be added to the lang packs of DataTable Paginator. Since this is coming in as an array from the ATTRS, Controller and View both need to read their own Strings package in. Also created a test to switch between en and fr langs to check for the correct verbiage in use.

Fixes issue #1167

Ping @Naouak

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