fix(react-tabs): focus selected tab by default

[dmytrokirpa]

Previous Behavior

When the focus shifts to the tab list, it either moves to the last tab that was focused on or defaults to the first tab.

And according to the https://www.w3.org/WAI/ARIA/apg/patterns/tabs/#keyboard_interaction this is not the expected behavior.

New Behavior

When the focus shifts to the tab list, it automatically moves to the currently selected tab, or if none is selected, it defaults to the first tab.

Related Issue(s)

• Fixes [Bug]: Tablist focus on first tab instead of selected tab #33223

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: entire library	1.162 MB 291.009 kB	1.162 MB 291.037 kB	60 B 28 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	69.21 kB 20.174 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	220.616 kB 63.902 kB
react-components react-components: FluentProvider & webLightTheme	44.447 kB 14.59 kB
react-portal-compat PortalCompatProvider	8.39 kB 2.64 kB
react-timepicker-compat TimePicker	107.372 kB 35.755 kB

_{🤖 This report was generated against addcaf6e6ac5dcfbddd68a52ffdf5a399ed7be5b}

[github-actions]

Pull request demo site: URL