General issues and improvements

[li223]

Several things need adding to this form project:

• Controls are not resizing with the window

• "General" main tab feels slightly claustrophobic

• Should probably have a nice dark theme because default colours look bad

• Number input limits, see below for limits

• Numeric validation for number boxes

• An idea of what else to add

• Save backup/restore system

• Colour picker needs fixing. It clashes with the dark theme, making it unreadable

[PtrStruct]

I'm working on this.