Revert "Remove width CSS rule for #wiki-rendering so content (eg hr) stays"
Revert "Remove width CSS rule for #wiki-rendering so content (eg hr) stays"

This reverts commit c50c03d8c9c02f6191bd76c23201526101d8c5f4.

strr/reviki,strr/reviki,CoreFiling/reviki,ashirley/reviki,ashirley/reviki,ashirley/reviki,strr/reviki,strr/reviki,ashirley/reviki,CoreFiling/reviki,strr/reviki,CoreFiling/reviki,CoreFiling/reviki,CoreFiling/reviki,ashirley/reviki