Path builder wider parameter ranges

[jukibom]

Originally requested by @Zernys in #86

The max value of the path builder parameter sliders are currently to restrictive. I've several times needed path lengths or angle increment increment larger values larger than what the sliders currently allow. You can currently set these parameters manually by editing the parameter text field, but pressing number keys while in this field changes your target type and closes the menu unless you use numpad keys.