Proviola layout: do not crop long text

**[Original report](https://bitbucket.org/Carst/proviola-source/issue/14) by Carst Tankink (Bitbucket: [Carst](https://bitbucket.org/Carst), GitHub: [Carst](https://github.com/Carst)).**

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Title says it all: in particular in the plain Proviola, the goal div can obscure longer lines.
