fix: drawer not closing on first render

[joaodantas91]

Changes proposed in this pull request:

Added a setTimeout around overlayWillOpen, to wait until this.containerElement can be updated

Reviewers should focus on:

This PR addresses the review left on #6399

[palantirtech]

Thanks for your interest in palantir/blueprint, @joaodantas91! Before we can accept your pull request, you need to sign our contributor license agreement - just visit https://cla.palantir.com/ and follow the instructions. Once you sign, I'll automatically update this pull request.

[adidahiya]

@joaodantas91 this PR is failing unit tests & formatting checks, I'll convert it to a draft for now. Happy to review once those checks are resolved, or if you have other feedback about the implementation.

[adidahiya]

Closing as this stale PR has not been updated for over a month. Ping if you want to re-open.