Layout Group (Tab) keyboard navigation behavior made consistent

When using keyboard navigation for Layout Groups (tab), arrow keys (up/down/left/right) are used to navigate the tabs once focus is set on the first tab, and the tab contents of each tab is opened automatically. It was noted that pressing tab a few more times caused the second tab to gain focus, but the contents of the tab did not open automatically or when enter was pressed, which was unexpected behavior. For accessibility best practices, tab focus should not be allowed on tab groups. To resolve this issue, this has been removed and the system will continue to follow auto activation of tabs on arrow keys.