<number id="init" type="spinbutton" arg="-num-discs %"
_label="Number of Discs" low="50" high="400" default="85"/>
- <number id="speed" type="slider" arg="-draw-delay %"
+ <number id="speed" type="slider" arg="-growth-delay %"
_label="Speed" _low-label="Slow" _high-label="Fast"
low="0" high="60000" default="30000" convert="invert"/>