fix(modal): reset breakpoint to initial breakpoint on present

[sean-perkins]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

When an inline sheet modal is dismissed, the breakpoint isn't set back to the initial breakpoint. When the sheet modal is presented again, the visual state will not match the internal state.

Issue URL: #25245

What is the new behavior?

• The internal currentBreakpoint state is set to the initialBreakpoint on dismiss.

Does this introduce a breaking change?

• Yes
• No

Other information