Fixed nonfatal error tabbing away from preview frame in Site Editor #69079
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What?
Closes #69037
Fixes tab navigation error in Site Editor preview frame
Why?
Tab navigation from preview frame causes console errors after #65204 removed an early return condition. Issue doesn't exist in WP 6.7.1 without Gutenberg.
How?
Restores early return in useTabNav hook:
This prevents unnecessary processing when no selection exists, fixing the error while maintaining functionality.
Testing Instructions
Testing Instructions for Keyboard
ScreenCast
Test.Focus.mov