Update classic theme

[jolelievre]

Questions	Answers
Branch?	8.0.x
Description?	Update classic theme with 2.0.6
Type?	bug fix
Category?	FO
BC breaks?	no
Deprecations?	no
Fixed ticket?	~
Related PRs	~
How to test?	~
Possible impacts?	~

[prestonBot]

Hi, thanks for this contribution!

I found some issues with the Pull Request description:

• Your pull request does not seem to fix any issue, consider creating one (see note below) and linking it by writing Fixes #1234.

Would you mind having a look at it? This will help us understand how interesting your contribution is, thank you very much!

About linked issues

Please consider opening an issue before submitting a Pull Request:

• If it's a bug fix, it helps maintainers verify that the bug is effectively due to a defect in the code, and that it hasn't been fixed already.
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• It may lead the Core Product team to mark that issue as a priority, further attracting the maintainers' attention.

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