På Vei - Input Focus Improvements por Adaline Simonian

This is a small extension that improves the input focus behaviour in lessons on the På Vei website, as well as companion websites to other Cappelen Damm courses such as Stein på Stein or Her på Berget.

Improvements

• When opening a lesson, the input focus is set to the first input field.
• Pressing the `Enter` key in a lesson is the same as clicking the `Neste` button, unless a button is focused.
• When a lesson is completed, the `Prøv igjen` button is focused if the lesson is failed, and the `Neste` button is focused if the lesson is passed.
  
  • If the `Prøv igjen` button is pressed, the input focus is set to the first input field.
    
  • If the `Neste` button is pressed, the input focus is set to the first input field in the next lesson.
    
  • If the lesson is the last lesson in the chapter, the input focus is set to the `Neste` or `Oppsummering` button in the chapter navigation.