Fix button group stacking context

[evansjohnson]

Fixes https://github.com/palantir/blueprint/issues/7440

Checklist

• [n/a] Includes tests
• [n/a] Update documentation

Changes proposed in this pull request:

Reset stacking context of button group component

Reviewers should focus on:

Could this unintentionally override any consumer land styling?

Screenshot

This PR ended up using the translateZ(0) method to reset the stacking context like we do for control groups but anything that resets the stacking context should be valid.

[changelog-app[bot]]

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Type

• [ ] Feature
• [ ] Improvement
• [x] Fix
• [ ] Break
• [ ] Deprecation
• [ ] Manual task
• [ ] Migration

Description Fix button group stacking context

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[svc-palantir-github]

apply same fix as control group

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.

[evansjohnson]

an LLM response when asking I need to reset a z-index stacking context in CSS, are there any performance considerations between z-index: 0 and transform: translateZ(0)? which would be more performant?

seeing this I'm tempted to say we should at least avoid introducing more translateZ(0), specifically for button groups which there may be a lot of rendered at once

we could separately consider switching the implementation to reset the control group stacking context but that has been in place for awhile

[svc-palantir-github]

lint?

Build artifact links for this commit: documentation | landing | table | demo

This is an automated comment from the deploy-preview CircleCI job.