Fix updating of add-on aircraft in the launcher.

Kick off a re-scan when adding or removing paths.

src/GUI/PathsDialog.cxx

@@ -124,11 +124,6 @@ void AddOnsPage::onAddSceneryPath()
         m_ui->sceneryPathsList->addItem(path);
         saveSceneryPaths();
     }
-
-    // work around a Qt OS-X bug - this dialog is ending ordered
-    // behind the main settings dialog (consequence of modal-dialog
-    // showing a modla dialog showing a modial dialog)
-    window()->raise();
 }
 
 void AddOnsPage::onRemoveSceneryPath()
@@ -175,11 +170,8 @@ void AddOnsPage::onAddAircraftPath()
         }
 
         saveAircraftPaths();
+        emit aircraftPathsChanged();
     }
-    // work around a Qt OS-X bug - this dialog is ending ordered
-    // behind the main settings dialog (consequence of modal-dialog
-    // showing a modla dialog showing a modial dialog)
-    window()->raise();
 }
 
 void AddOnsPage::onRemoveAircraftPath()
@@ -187,6 +179,7 @@ void AddOnsPage::onRemoveAircraftPath()
     if (m_ui->aircraftPathsList->currentItem()) {
         delete m_ui->aircraftPathsList->currentItem();
         saveAircraftPaths();
+        emit aircraftPathsChanged();
     }
 }
 

src/GUI/PathsDialog.hxx

@@ -25,7 +25,8 @@ public:
 signals:
     void downloadDirChanged();
     void sceneryPathsChanged();
-    
+    void aircraftPathsChanged();
+
 private slots:
     void onAddSceneryPath();
     void onRemoveSceneryPath();

src/GUI/QtLauncher.cxx

@@ -870,6 +870,8 @@ QtLauncher::QtLauncher() :
             this, &QtLauncher::onDownloadDirChanged);
     connect(addOnsPage, &AddOnsPage::sceneryPathsChanged,
             this, &QtLauncher::setSceneryPaths);
+    connect(addOnsPage, &AddOnsPage::aircraftPathsChanged,
+            this, &QtLauncher::onAircraftPathsChanged);
 
     m_ui->tabWidget->addTab(addOnsPage, tr("Add-ons"));
     // after any kind of reset, try to restore selection and scroll
@@ -1635,8 +1637,9 @@ void QtLauncher::onDownloadDirChanged()
 
     globals->get_subsystem<FGHTTPClient>()->init();
 
-    QSettings settings;
     // re-scan the aircraft list
+    QSettings settings;
+
     m_aircraftModel->setPackageRoot(globals->packageRoot());
     m_aircraftModel->setPaths(settings.value("aircraft-paths").toStringList());
     m_aircraftModel->scanDirs();
@@ -1647,6 +1650,13 @@ void QtLauncher::onDownloadDirChanged()
     setSceneryPaths();
 }
 
+void QtLauncher::onAircraftPathsChanged()
+{
+    QSettings settings;
+    m_aircraftModel->setPaths(settings.value("aircraft-paths").toStringList());
+    m_aircraftModel->scanDirs();
+}
+
 bool QtLauncher::shouldShowOfficialCatalogMessage() const
 {
     QSettings settings;

src/GUI/QtLauncher_private.hxx

@@ -109,6 +109,7 @@ private slots:
 
     void onPackagesNeedUpdate(bool yes);
 
+    void onAircraftPathsChanged();
 private:
 
     /**