Replace destroy() method with the more idiomatic close()
Use gtk_window_close()
on a GtkWindow
instance is more idiomatic
than calling gtk_widget_destroy()
, and it's more in line with GTK4,
once we've released it.
For some languages, like Rust, the destroy() method is unsafe, as it operates on the reference counting of the C instance.
Fixes: #56 (closed)