Fix blogroll

[Raincal]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines.
• Tests for the changes have been added (for bug fixes / features).
• Docs have been added / updated (for bug fixes / features).

PR Type

What kind of change does this PR introduce?

• Bugfix.
• Feature.
• Code style update (formatting, local variables).
• Refactoring (no functional changes, no api changes).
• Build related changes.
• CI related changes.
• Documentation content changes.
• Other... Please describe:

What is the current behavior?

In scheme Pisces and Gemini

• The blogroll links should be in the center of the sidebar
• The default setting links_layout: inline doesn't work

In all scheme

• each blogroll link should have a max-width

Issue Number(s): N/A

What is the new behavior?

Does this PR introduce a breaking change?

• Yes.
• No.

[ivan-nginx]

@Raincal thank's!