Add Window::is_minimized

Co-authored-by: Kirill Chibisov <contact@kchibisov.com>
Co-authored-by: Markus Siglreithmaier <m.siglreith@gmail.com>

src/platform_impl/web/window.rs

@@ -287,6 +287,12 @@ impl Window {
         // Intentionally a no-op, as canvases cannot be 'minimized'
     }
 
+    #[inline]
+    pub fn is_minimized(&self) -> Option<bool> {
+        // Canvas cannot be 'minimized'
+        Some(false)
+    }
+
     #[inline]
     pub fn set_maximized(&self, _maximized: bool) {
         // Intentionally a no-op, as canvases cannot be 'maximized'