Missing text alignment for `<button>`
Missing text alignment for `<button>`

This was broken in e74e30678c54738c100a240de9341f1c8bcce948 which stripped all default formatting from `<button>`, but failed to reapply the alignment in `.button`.

Fixes #4969

WoltLab/WCF,WoltLab/WCF,WoltLab/WCF,WoltLab/WCF