Track already formatted data table columns

[mneudert]

Description:

Please include a description of this change and which issue it fixes. If no issue exists yet please include context and what problem it solves.

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[michalkleiner]

Could perhaps return type self and return $this to support fluent methods chaining?

[sgiehl]

Generally I like the idea of method chaining. But we imho should decide to either add that to all methods in a class or to none. Everything between might confuse more than it helps in the end.

[github-actions]

If you don't want this PR to be closed automatically in 28 days then you need to assign the label 'Do not close'.

[github-actions]

This PR was last updated more than one month ago, maybe it's time to close it. Please check if there is anything we still can do or close this PR. ping @matomo-org/core-reviewers