Multi-Monitors: new setting to explicitely disable panels to appear on screen without bar.

On my setup this saves about 130MB per 1080p monitor where the bar is
not shown. I only interact with noctalia on my main screen.

Modules/MainScreen/AllScreens.qml

@@ -18,12 +18,23 @@ Variants {
       if (!modelData || !modelData.name) {
         return false;
       }
-      Logger.d("Shell", "MainScreen activated for", modelData?.name);
-      return true;
+
+      let shouldLoad = true;
+      if (!Settings.data.general.allowPanelsOnScreenWithoutBar) {
+        // Check if bar is configured for this screen
+        var monitors = Settings.data.bar.monitors || [];
+        shouldLoad = monitors.length === 0 || monitors.includes(modelData?.name);
+      }
+
+      if (shouldLoad) {
+        Logger.d("AllScreens", "Screen activated: ", modelData?.name);
+      }
+      return shouldLoad;
     }
 
     property bool windowLoaded: false
 
+    // Main Screen loader - Bar and panels backgrounds
     Loader {
       id: windowLoader
       active: parent.shouldBeActive
@@ -58,7 +69,7 @@ Variants {
       }
 
       onLoaded: {
-        Logger.d("Shell", "BarContentWindow created for", modelData?.name);
+        Logger.d("AllScreens", "BarContentWindow created for", modelData?.name);
       }
     }
 
@@ -80,14 +91,21 @@ Variants {
       }
 
       onLoaded: {
-        Logger.d("Shell", "BarExclusionZone created for", modelData?.name);
+        Logger.d("AllScreens", "BarExclusionZone created for", modelData?.name);
       }
     }
 
     // TrayMenuWindow - separate window for tray context menus
-    // This must be a top-level PanelWindow.
+    // Disabled when bar is hidden or not configured for this screen
     Loader {
-      active: parent.windowLoaded && parent.shouldBeActive
+      active: {
+        if (!parent.windowLoaded || !parent.shouldBeActive || !BarService.isVisible)
+          return false;
+
+        // Check if bar is configured for this screen
+        var monitors = Settings.data.bar.monitors || [];
+        return monitors.length === 0 || monitors.includes(modelData?.name);
+      }
       asynchronous: false
 
       sourceComponent: TrayMenuWindow {
@@ -95,7 +113,7 @@ Variants {
       }
 
       onLoaded: {
-        Logger.d("Shell", "TrayMenuWindow created for", modelData?.name);
+        Logger.d("AllScreens", "TrayMenuWindow created for", modelData?.name);
       }
     }
   }

Modules/MainScreen/SmartPanelWindow.qml

@@ -55,6 +55,7 @@ PanelWindow {
   color: Color.transparent
   mask: null // No mask - content window is rectangular
   visible: isPanelOpen
+  screen: placeholder.screen // Explicitly set screen to match placeholder
 
   // Wayland layer shell configuration - fullscreen window
   WlrLayershell.layer: WlrLayer.Top