Input box does not get the focus automatically when using "Verify" with Koch tutor

[solsticedhiver]

hi;
I am starting to learn morse code with "kochmorse" and its Koch tutor.
I have checked the "Verify" checkbox in the settings, to be eble to type on my keyboard the letter, to get quick and easy check of my understanding of the code.

But each time I start to practice, I am stuck with that "not really a bug" thing.
It's simply that the input box for my answers does not have the focus, so I type the characters in the "void";
And I have to restart over.

Please just add a simple line of code, so that the input box get automatically the focus, after you clicked on the start button.

Thanks