Allow custom widget to be deleted

src/ui/MainWindow.cc

@@ -753,6 +753,7 @@ void MainWindow::addTool(SubMainWindow *parent,VIEW_SECTIONS view,QDockWidget* w
         centralWidgetToDockWidgetsMap[view][widget->objectName()]= widget;
         connect(tempAction,SIGNAL(triggered(bool)),this, SLOT(showTool(bool)));
         connect(widget, SIGNAL(visibilityChanged(bool)), tempAction, SLOT(setChecked(bool)));
+        connect(widget, SIGNAL(destroyed()), tempAction, SLOT(deleteLater()));
         tempAction->setChecked(widget->isVisible());
     }
     else
@@ -786,9 +787,20 @@ QDockWidget* MainWindow::createDockWidget(QWidget *parent,QWidget *child,QString
         widget->setMinimumWidth(minwidth);
     }
     addTool(qobject_cast<SubMainWindow*>(parent),view,widget,title,area);
+    connect(child, SIGNAL(destroyed()), widget, SLOT(deleteLater()));
+    connect(widget, SIGNAL(destroyed()), this, SLOT(dockWidgetDestroyed()));
 
     return widget;
 }
+void MainWindow::dockWidgetDestroyed()
+{
+    QDockWidget *dock = dynamic_cast<QDockWidget *>(QObject::sender());
+    Q_ASSERT(dock);
+    if(!dock) return;
+
+    dockWidgets.removeAll(dock);
+}
+
 void MainWindow::loadDockWidget(QString name)
 {
     if (centralWidgetToDockWidgetsMap[currentView].contains(name))
@@ -1039,8 +1051,6 @@ void MainWindow::createCustomWidget()
     settings.setValue(QString("TOOL_PARENT_") + tool->objectName(),currentView);
     settings.endGroup();
 
-
-
     //connect(tool, SIGNAL(destroyed()), dock, SLOT(deleteLater()));
     //dock->setWidget(tool);
 

src/ui/MainWindow.h

@@ -307,6 +307,10 @@ public slots:
 
     void commsWidgetDestroyed(QObject *obj);
 
+protected slots:
+    /** @brief Called by a dock widget when it is has been deleted */
+    void dockWidgetDestroyed();
+
 signals:
     void styleChanged(MainWindow::QGC_MAINWINDOW_STYLE newTheme);
     void styleChanged();

src/ui/designer/QGCToolWidget.cc

@@ -668,11 +668,12 @@ void QGCToolWidget::deleteWidget()
     // Hide
     this->hide();
     instances()->remove(getTitle());
-    /*QSettings settings;
-    settings.beginGroup(getTitle());
-    settings.remove("");
+
+    QSettings settings;
+    settings.beginGroup("QGC_MAINWINDOW");
+    settings.remove(QString("TOOL_PARENT_") + objectName());
     settings.endGroup();
-    storeWidgetsToSettings();*/
+
     storeWidgetsToSettings();
 
     // Delete