Large file size

[SAXN-SYNX]

Describe the bug

Just hello world creates ~20 mb file.

`package main

import (
	"cogentcore.org/core/core"
)

func main() {
	win := core.NewBody("My Application")
	core.NewButton(win).SetText("Hello, World !")
	win.RunMainWindow()
}
`

How to reproduce

just build the code with core build.

Example code

No response

Relevant output

No response

Platform

Linux

[kkoreilly]

This is a duplicate of #733; we will continue to work on reducing binary sizes over time as much as possible.