[Gtk] Refactor presenting window

Include the correct usage for other display servers.

Still not sure how to get the proper timestamp for Wayland or Quartz but
I read that using 0 equals the GDK_CURRENT_TIME which suffices for now.

deluge/ui/gtk3/addtorrentdialog.py

@@ -176,11 +176,17 @@ class AddTorrentDialog(component.Component):
             self.dialog.set_transient_for(None)
             self.dialog.set_position(Gtk.WindowPosition.CENTER)
 
-        self.dialog.present()
         if focus:
             timestamp = main_window.get_timestamp()
             if windowing('X11'):
+                # Use present with X11 set_user_time since
+                # present_with_time is inconsistent.
+                self.dialog.present()
                 self.dialog.get_window().set_user_time(timestamp)
+            else:
+                self.dialog.present_with_time(timestamp)
+        else:
+            self.dialog.present()
 
     def hide(self):
         self.dialog.hide()

deluge/ui/gtk3/mainwindow.py

@@ -178,9 +178,14 @@ class MainWindow(component.Component):
         def restore():
             # Restore the proper x,y coords for the window prior to showing it
             component.resume(self.child_components)
-            self.window.present()
-            if GdkX11:
-                self.window.get_window().set_user_time(self.get_timestamp())
+            timestamp = self.get_timestamp()
+            if windowing('X11'):
+                # Use present with X11 set_user_time since
+                # present_with_time is inconsistent.
+                self.window.present()
+                self.window.get_window().set_user_time(timestamp)
+            else:
+                self.window.present_with_time(timestamp)
             self.load_window_state()
 
         if self.config['lock_tray'] and not self.visible():