Generate points for start position

[Glusk]

Add a slider to the tool bar, allowing the user to specify the amount of starting sprouts.

On "New game" click, the value set by the slider should be used to generate a new game with the specified amount of points, overriding the old game.

Sprouts can be aligned in a circle, with the center at the center of the screen. Twink the radius and the distance between the points for various numbers of initial sprouts.