DataGrid: Menu items are truncated in the Filter Builder popup

[dmlvr]

No description provided.

[Copilot]

Pull Request Overview

This PR fixes a bug where menu items in the Filter Builder popup were being truncated. The fix addresses the positioning behavior of the dropdown by changing how it handles parent scrolling and by removing a CSS positioning constraint.

Key changes:

• Modified popup configuration to close on scroll instead of repositioning
• Removed position: relative CSS rule that was causing truncation
• Updated the corresponding test to verify the new close-on-scroll behavior

Reviewed Changes

Copilot reviewed 3 out of 6 changed files in this pull request and generated 1 comment.

File	Description
packages/devextreme/js/__internal/filter_builder/m_filter_builder.ts	Changed popup behavior from container-based positioning to scroll-triggered hiding
packages/devextreme-scss/scss/widgets/base/filterBuilder/_index.scss	Removed position: relative CSS rule that contributed to menu truncation
e2e/testcafe-devextreme/tests/common/filterBuilder/filterBuilderScrolling.ts	Updated test to verify popup closes on scroll instead of moving with scroll