width of multiline text lable wrong on windows 10

On windows 10 1903, the width of multiline text lable is the sum of each line's width

below is my Go test code
```go
package main

import (
"github.com/andlabs/ui"
_ "github.com/andlabs/ui/winmanifest"
)
func setupUi() {
mainwin := ui.NewWindow("", 100, 500, true)
hbox := ui.NewHorizontalBox()
mainwin.SetChild(hbox)
b := ui.NewButton("TEST")
l := ui.NewLabel("")
hbox.Append(b, true)
hbox.Append(l, true)
s1 := "\r\n\r\n1\r\n\r\n\r\n\r\n"
s2 := "1"
for i := 0; i < 6; i++ {
s1 += s1
s2 += s2
}
b.OnClicked(func(button *ui.Button) {
if l.Text() == s1{
l.SetText(s2)
}else{
l.SetText(s1)
}
})
mainwin.Show()
}
func main() {
ui.Main(setupUi)
}
```