Check for duplicates

• I have searched for similar issues before opening a new one.

Description

Value connections are no longer navigable if they are empty. However, if you delete a block in this position, the cursor selects this value connection.

Value connections should be navigable if empty and this is a reasonable position at which to insert a block.

Reproduction steps

1. Go to the keyboard navigation plugin test page
2. Add an if block
3. Use the right arrow to move in
4. The value connection is skipped
5. Add a boolean to the value connection using keyboard controls, then delete it
6. The value connection is now selected, but there is no other way to get to it.

Stack trace

Screenshots

Browsers

No response