app/internal/wm: use Option method to initialize windows

Added (*w.window).Option methods to the backends and use them for setting the initial options passed into NewWindow.

Signed-off-by: pierre <pierre.curto@gmail.com>

app/internal/wm/os_js.go

@@ -82,9 +82,7 @@ func NewWindow(win Callbacks, opts *Options) error {
 	})
 	w.addEventListeners()
 	w.addHistory()
-	if o := opts.WindowMode; o != nil {
-		w.windowMode(*o)
-	}
+	w.Option(opts)
 	w.w = win
 
 	go func() {
@@ -476,6 +474,12 @@ func (w *window) WriteClipboard(s string) {
 	w.clipboard.Call("writeText", s)
 }
 
+func (w *window) Option(opts *Options) {
+	if o := opts.WindowMode; o != nil {
+		w.windowMode(*o)
+	}
+}
+
 func (w *window) SetCursor(name pointer.CursorName) {
 	style := w.cnv.Get("style")
 	style.Set("cursor", string(name))