Turn off all sparks
Turn off all Sparks with one click.
When it's close to the end of the spark week (a couple hours) and you just got to your spark goal there might be a huge gap between this goal and the new one. You don't want people to waste their sparks so you turn off all spark skills and tell them to hold it until next spark week.
It would be amazing to have a button to turn off all sparks.