Assistant: Fix our ikiwiki CSS to not break when bootstrap is added on top of if

Our idea for the Installation Assistant is to add bootstrap.css on top of our custom ikiwiki style. This works 95% but some stuff has to be adjusted in our current CSS code.

Feature Branch: web/9314-fix-ikiwiki-CSS

Attachments

0001-Add-bug-about-default-behaviour-of-meta-plugin-for-s.patch

Parent Task: #9214 (closed)

Original created by @sajolida on 9314 (Redmine)

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