app: replace driver.Close with Perform(ActionClose)

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/os_macos.go

@@ -375,6 +375,9 @@ func (w *window) Perform(acts system.Action) {
 			C.raiseWindow(w.window)
 		}
 	})
+	if acts&system.ActionClose != 0 {
+		C.closeWindow(w.window)
+	}
 }
 
 func (w *window) SetCursor(cursor pointer.Cursor) {
@@ -413,10 +416,6 @@ func (w *window) runOnMain(f func()) {
 	})
 }
 
-func (w *window) Close() {
-	C.closeWindow(w.window)
-}
-
 func (w *window) setStage(stage system.Stage) {
 	if stage == w.stage {
 		return