Change Default Clip Behavior to antiAliasWithSaveLayer to fix Top Bar rendering issue

[ulusoyca]

Description

This PR updates the default clip behavior of the WoltModalSheet from Clip.antiAlias to Clip.antiAliasWithSaveLayer. The change addresses a rendering issue where a thin border was visible at the top bar of the modal sheet, which was not the intended design.

Changes

Modified the clipBehavior getter in WoltModalSheetThemeData to return Clip.antiAliasWithSaveLayer instead of Clip.antiAlias.

antiAlias Vs antiAliasWithSaveLayer

Related Issues

#162

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My PR includes tests for all changed/updated/fixed behaviors.
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Breaking Change

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• Yes, this is a breaking change.
• No, this is not a breaking change.

[github-actions]

Visit the preview URL for this PR (updated for commit fee15cc):

• https://coffeemakerexample--pr164-change-default-top-b-ygaoqmlg.web.app
• https://playgroundwoltexample--pr164-change-default-top-b-prgzq7qs.web.app
• https://playgroundnavigator2woltexample--pr164-change-default-4iwm3uil.web.app

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[TahaTesser]

LGTM!