Add prop to allow opening a column header menu without selecting the column's cells

[OliverWales]

Fixes #5929

Checklist

• Includes tests
• Update documentation

Changes proposed in this pull request:

Add a prop to determine whether clicking the column header menu should select the column's cells. Default true to preserve the current behaviour.

Screenshot

With prop set to false, opening the column header menu does not cause the column's cells to be selected:

[adidahiya]

thanks @OliverWales. CI did not build correctly on your branch, did you by chance enable the CircleCI project on your fork? You should disable that; as our CircleCI project will build forks automatically. It's ok, though, the code looks good, and I can test this out on develop after merging.

[adidahiya]

Checked out the code locally, it builds & lints successfully 👍

Dismissed because the approval was invalidated by another commit

[OliverWales]

Hi @adidahiya, I'm not aware of having touched anything CI-related on my fork, where do I check if this is the case and disable it?

[adidahiya]

@OliverWales try going to https://app.circleci.com/pipelines/github/OliverWales/blueprint

[OliverWales]

Doesn't look like it 🤔