I encountered this small bug when I wanted to remove the command line from the layout.
To reproduce:
1. Add some text to the command line
2. Open Options/Layout and uncheck the 'Show command line'.
3. Press apply or OK.
The command line does not disappear. If you go to the command line and press ESC (which empties the command line), the command line disappears.
So the command line cannot be removed as long as it contains text.
If this is a bug or a feature I will let others decide. It confused me for a second, that's for sure

regards,
Bård