fix(ui5-view-settings-dialog): ensure proper focus management in filter view

[hinzzx]

Overview

Two issues were identified in the ViewSettingsDialog component when testing our ACC Samples in the Accessibility Hub:

1. Focus is lost when entering the filter options view - When clicking on a filter item to see its options (second-level navigation), focus was not properly managed, leaving users of assistive technologies without a clear focus point.

2. Tab order goes to Cancel first in some situations - After entering filter options, pressing Tab would sometimes move focus to the Cancel button before the OK button, which is inconsistent with expected dialog behavior.

What We Did

• Added @query decorators to reference the filter list
• after rendering completes, focus is set on the first selected item (if any) or the first item in the filter options list
• when navigating back to the filter list, focus is set on the first item

What This Fixes

• Focus management — Focus is now properly set when entering filter options (second-level view)
• Tab order — Tab correctly moves from filter options to the OK button (Emphasized) first, then to Cancel
• Keyboard navigation — Users can navigate the filter workflow entirely with keyboard
• Screen reader experience — Assistive technology users receive proper focus context when navigating between filter views

Before

After

[ui5-webcomponents-bot]

🚀 Deployed on https://pr-13092--ui5-webcomponents-preview.netlify.app