translation update

Capitalized first letters of all setting descriptions (de-informal)

Use DokuWiki's `showuseras` setting instead of custom user namespace

This removes the custom user namespace links and replaces the whole
custom link generation by standard DokuWiki code. Note that p

Use DokuWiki's `showuseras` setting instead of custom user namespace

This removes the custom user namespace links and replaces the whole
custom link generation by standard DokuWiki code. Note that previously
the id of the user page was the full name while now it is the user id
(if enabled in DokuWiki).

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added de-informal