Add settings for infobox positioning (center position, minimum dimensions)

[Billiam]

Adds XCenter, YCenter, MinWidth and MinHeight settings for the info box, allowing it to be moved to different locations on the playfield with (somewhat) different dimensions.

I've labeled the dimension settings minimum height and width, though only the height will be autosized.

Default settings

Changed position

InfoBox.MinWidth = 400
InfoBox.MinHeight = 343
InfoBox.XCenter = 0.3
InfoBox.YCenter = 0