fix: pass cs.height to Window column so height:100vh constrains layout

src/renderer.rs

@@ -477,6 +477,7 @@ pub fn render_element<'a>(
     if el.type_name == "Window" {
         let spacing = cs.spacing.unwrap_or(12.0);
         let mut col = column![].spacing(spacing).width(Length::Fill);
+        if let Some(h) = cs.height { col = col.height(h); }
 
         let mut window_fixed_layers = Vec::new();
         let mut window_abs_layers = Vec::new();