Remove buttons/hide buttons for length/mass changes during swinging

[gorwat]

Should be able to change weight and length as pendulum moves as this makes things more intuitive. It also makes it easier to see how the pendulum is affected/not affected by changes to it.

Keep in mind that this will affect the success conditions, most notably on the weight challenge.

[ziyi01]

Snabblösning:

• [x] Dölj knapparna

[emelieeee]

Nu toggles dessa knappar av när pendeln svingar så att man inte skall tro att det skall gå att ändra medans den svingar.