Activate newly mapped windows with a valid activation token

most of the time the activation token is passed
while the window is still unmapped. in this case
store the intend to activate the window for
later retrieval on map.

niri-visual-tests/src/cases/layout.rs

@@ -3,7 +3,7 @@ use std::time::Duration;
 
 use niri::animation::Clock;
 use niri::layout::workspace::ColumnWidth;
-use niri::layout::{LayoutElement as _, Options};
+use niri::layout::{ActivateWindow, LayoutElement as _, Options};
 use niri::render_helpers::RenderTarget;
 use niri_config::{Color, FloatOrInt, OutputName};
 use smithay::backend::renderer::element::RenderElement;
@@ -162,7 +162,8 @@ impl Layout {
         window.request_size(ws.new_window_size(width, window.rules()), false, None);
         window.communicate();
 
-        self.layout.add_window(window.clone(), width, false);
+        self.layout
+            .add_window(window.clone(), width, false, ActivateWindow::default());
         self.windows.push(window);
     }