Добавил сервисную страницу, небольшой рефакторинг

main.qml

@@ -16,6 +16,14 @@ ApplicationWindow {
         property string serviceUrl: ""
     }
 
+    LightsModel {
+        id: lightsModel
+
+        serviceUrl: settings.serviceUrl
+
+        onError: stackView.showError(text)
+    }
+
     header: ToolBar {
         contentHeight: 36
 
@@ -72,16 +80,19 @@ ApplicationWindow {
                 }
             }
 
+            ItemDelegate {
+                text: qsTr("Service")
+                width: parent.width
+                onClicked: {
+                    stackView.openPage("ServiceForm.qml")
+                }
+            }
+
             ItemDelegate {
                 text: qsTr("Settings")
                 width: parent.width
                 onClicked: {
-                    if (stackView.depth > 1) {
-                        stackView.pop()
-                    }
-
-                    stackView.push("SettingsForm.qml")
-                    drawer.close()
+                    stackView.openPage("SettingsForm.qml")
                 }
             }
         }
@@ -91,6 +102,19 @@ ApplicationWindow {
         id: stackView
         initialItem: "HomeForm.qml"
         anchors.fill: parent
+
+        function openPage(page) {
+            if (depth > 1) {
+                pop()
+            }
+
+            push(page)
+            drawer.close()
+        }
+
+        function showError(text) {
+            ToolTip.show(text, 1000)
+        }
     }
 
     onClosing: {