Fix QML warnings at shutdown

interface/resources/qml/AddressBarDialog.qml

@@ -17,7 +17,7 @@ import "windows"
 Window {
     id: root
     HifiConstants { id: hifi }
-    anchors.centerIn: parent
+
     objectName: "AddressBarDialog"
     frame: HiddenFrame {}
 
@@ -29,6 +29,19 @@ Window {
     width: addressBarDialog.implicitWidth
     height: addressBarDialog.implicitHeight
 
+    Component.onCompleted: {
+        root.parentChanged.connect(center);
+        center();
+    }
+    Component.onDestruction: {
+        root.parentChanged.disconnect(center);
+    }
+
+    function center() {
+        // Explicitly center in order to avoid warnings at shutdown
+        anchors.centerIn = parent;
+    }
+
     AddressBarDialog {
         id: addressBarDialog
         implicitWidth: backgroundImage.width

interface/resources/qml/Stats.qml

@@ -3,10 +3,24 @@ import QtQuick 2.3
 import QtQuick.Controls 1.2
 
 Item {
-    anchors.fill: parent
+    id: stats
+
     anchors.leftMargin: 300
     objectName: "StatsItem"
 
+    Component.onCompleted: {
+        stats.parentChanged.connect(fill);
+        fill();
+    }
+    Component.onDestruction: {
+        stats.parentChanged.disconnect(fill);
+    }
+
+    function fill() {
+        // Explicitly fill in order to avoid warnings at shutdown
+        anchors.fill = parent;
+    }
+
     Hifi.Stats {
         id: root
         objectName: "Stats"

interface/resources/qml/windows-uit/Window.qml

@@ -248,9 +248,15 @@ Fadable {
 
     children: [ swallower, frame, pane, activator ]
 
-    Component.onCompleted: { raise(); setDefaultFocus(); }
+    Component.onCompleted: {
-    Component.onDestruction: windowDestroyed();
+        window.parentChanged.connect(raise);
-    onParentChanged: raise();
+        raise();
+        setDefaultFocus();
+    }
+    Component.onDestruction: {
+        window.parentChanged.disconnect(raise);  // Prevent warning on shutdown
+        windowDestroyed();
+    }
 
     onVisibleChanged: {
         if (!visible && destroyOnInvisible) {

interface/resources/qml/windows/Window.qml

@@ -114,9 +114,14 @@ Fadable {
 
     children: [ swallower, frame, content, activator ]
 
-    Component.onCompleted: raise();
+    Component.onCompleted: {
-    Component.onDestruction: windowDestroyed();
+        window.parentChanged.connect(raise);
-    onParentChanged: raise();
+        raise();
+    }
+    Component.onDestruction: {
+        window.parentChanged.disconnect(raise);  // Prevent warning on shutdown
+        windowDestroyed();
+    }
 
     onVisibleChanged: {
         if (!visible && destroyOnInvisible) {

interface/src/Application.cpp

@@ -1150,6 +1150,9 @@ void Application::aboutToQuit() {
 
     getActiveDisplayPlugin()->deactivate();
 
+    // Hide Running Scripts dialog so that it gets destroyed in an orderly manner; prevents warnings at shutdown.
+    DependencyManager::get<OffscreenUi>()->hide("RunningScripts");
+
     _aboutToQuit = true;
 
     cleanupBeforeQuit();

libraries/ui/src/OffscreenUi.cpp

@@ -143,6 +143,13 @@ void OffscreenUi::toggle(const QUrl& url, const QString& name, std::function<voi
     }
 }
 
+void OffscreenUi::hide(const QString& name) {
+    QQuickItem* item = getRootItem()->findChild<QQuickItem*>(name);
+    if (item) {
+        item->setVisible(false);
+    }
+}
+
 class ModalDialogListener : public QObject {
     Q_OBJECT
     friend class OffscreenUi;

libraries/ui/src/OffscreenUi.h

@@ -37,6 +37,7 @@ public:
     virtual void create(QOpenGLContext* context) override;
     void createDesktop(const QUrl& url);
     void show(const QUrl& url, const QString& name, std::function<void(QQmlContext*, QObject*)> f = [](QQmlContext*, QObject*) {});
+    void hide(const QString& name);
     void toggle(const QUrl& url, const QString& name, std::function<void(QQmlContext*, QObject*)> f = [](QQmlContext*, QObject*) {});
     bool shouldSwallowShortcut(QEvent* event);
     bool navigationFocused();