Improve the CSS of the boxed titles
Originally created by @sajolida on #6323 (Redmine)
The boxed titles on the website don’t fit well in the current color scheme of the website and don’t stand out enough in the structure of the page. Those can be seen on:
- the homepage: “news”, “security”
- the support page: “Search the documentation”, “Troubleshooting”, “Get in touch with us”
- the troubleshooting page: “Report an error”, “Request a feature”, “Talk”
- the contribute page: “Design”, “Tools”, “Other development pages”, “Talk with us”
This styling can probably be simply removed from the CSS, and the style of the columns on the homepage, and troubleshooting redefined. While doing this change some HTML code or HTML pages can be converted to markdown. Markdown is lighter to work with and more resilient to dead links. Some titles also need to be converted to use sentence-style capitalization as the rest of the website.