Order of Gui, Show in __New is critical for percent positioned items

[evilC]

For percent-positioned items, show needs to be at start, and absolute sizes of parents set(or they already know their size when the child is added), else items cannot work out a percentage of an unknown value.

Possibly merge New and Show into one item? Possible to merge items for show into new and have new call show automatically?

Would need to be able to remove keys from the options object before serialization.