Add loader to ScreenCorner, proper position for SidePanel, update Settings & NPanel to only display one NPanel at a time (latest one)

Widgets/NLoader.qml

@@ -27,6 +27,7 @@ Loader {
 
   Connections {
     target: loader.item
+    ignoreUnknownSignals: true
     function onDismissed() {
       loader.isLoaded = false
     }

Widgets/NPanel.qml

@@ -13,11 +13,20 @@ PanelWindow {
   signal dismissed
 
   function hide() {
-    visible = false
+    //visible = false
     dismissed()
   }
 
   function show() {
+    // Ensure only one panel is visible at a time using Settings as ephemeral store
+    try {
+      if (Settings.openPanel && Settings.openPanel !== outerPanel && Settings.openPanel.hide) {
+        Settings.openPanel.hide()
+      }
+      Settings.openPanel = outerPanel
+    } catch (e) {
+      // ignore
+    }
     visible = true
   }
 
@@ -44,4 +53,16 @@ PanelWindow {
       easing.type: Easing.InOutCubic
     }
   }
+
+  Component.onDestruction: {
+    try {
+      if (visible && Settings.openPanel === outerPanel) Settings.openPanel = null
+    } catch (e) {}
+  }
+
+  onVisibleChanged: function() {
+    try {
+      if (!visible && Settings.openPanel === outerPanel) Settings.openPanel = null
+    } catch (e) {}
+  }
 }