window: Move Sort & Filter menu to center

cartridges/ui/window.blp

@@ -26,34 +26,24 @@ template $Window: Adw.ApplicationWindow {
   content: Adw.ToolbarView {
     [top]
     Adw.HeaderBar {
-      title-widget: Adw.Clamp {
+      title-widget: Adw.Clamp clamp {
-        maximum-size: 500;
+        tightening-threshold: bind clamp.maximum-size;
-        tightening-threshold: 500;
 
-        child: SearchEntry search_entry {
+        child: CenterBox {
+          hexpand: true;
+
+          center-widget: SearchEntry search_entry {
             hexpand: true;
             placeholder-text: _("Search games");
             search-started => $_search_started();
             search-changed => $_search_changed();
             stop-search => $_stop_search();
           };
-      };
 
-      [end]
+          end-widget: MenuButton {
-      MenuButton {
-        icon-name: "open-menu-symbolic";
-        tooltip-text: _("Main Menu");
-        primary: true;
-
-        menu-model: menu {
-          item (_("About Cartridges"), "app.about")
-        };
-      }
-
-      [end]
-      MenuButton {
             icon-name: "filter-symbolic";
             tooltip-text: _("Sort & Filter");
+            margin-start: 6;
 
             menu-model: menu {
               section {
@@ -94,6 +84,19 @@ template $Window: Adw.ApplicationWindow {
                 item (_("Show Hidden Games"), "win.show-hidden")
               }
             };
+          };
+        };
+      };
+
+      [end]
+      MenuButton {
+        icon-name: "open-menu-symbolic";
+        tooltip-text: _("Main Menu");
+        primary: true;
+
+        menu-model: menu {
+          item (_("About Cartridges"), "app.about")
+        };
       }
     }