DataGrid: fix Tab press handler in filter range (T1312521)

[anna-shakhova]

No description provided.

[Copilot]

Pull request overview

This PR refactors the DataGrid filter row code by removing unnecessary/redundant code and improving type safety and test organization.

Changes:

• Refactored filter range overlay container positioning to be relative to grid headers instead of viewport
• Improved Tab key navigation logic to handle the last column edge case
• Enhanced type safety by adding MenuInternal type import and removing TypeScript error suppressions
• Reorganized TestCafe tests by separating visual and functional tests into dedicated files

Reviewed changes

Copilot reviewed 4 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
packages/devextreme/testing/tests/DevExpress.ui.widgets.dataGrid/filterRow.tests.js	Added helper function getFilterRowOverlay() to simplify test assertions and updated all overlay selector references
packages/devextreme/js/__internal/grids/grid_core/filter/m_filter_row.ts	Changed overlay container from viewport to grid element, improved Tab navigation to handle last column, added MenuInternal type, removed unnecessary blur trigger
e2e/testcafe-devextreme/tests/dataGrid/common/filterRow/visual.ts	New file containing visual/screenshot tests previously in functional.ts
e2e/testcafe-devextreme/tests/dataGrid/common/filterRow/functional.ts	Removed visual tests (moved to visual.ts), cleaned up imports, reorganized test order
e2e/testcafe-devextreme/tests/dataGrid/common/filterRow/T1163100_changeFIlterIcon.visual_matrix.ts	New test file for T1163100 filter icon change visual tests