set icon with `webview.icon`?

[spectereye]

set icon with webview.icon?

[congzhangzh]

I am not sure whether we can find a portable way to implement it? Maybe you can do a pr? @spectereye

We can get the underlying handle, do it properly for win32/gtk/and mac?

[congzhangzh]

how about this one？ https://github.com/electron/rcedit @spectereye

[spectereye]

rcedit or ResourceHacker would work for .exe file, but better to set icon with webview.icon if possible?