crash fix:from unloading views

--when as Always Visible view was unloaded from
a CentralLayout because its Activity was closing
it was creating a crash. This patch fixes the
situation by releasing sensitive view signals
earlier.

app/layout/genericlayout.cpp

@@ -72,6 +72,14 @@ void GenericLayout::unloadContainments()
              << " ,latteViews in memory ::: " << m_latteViews.size()
              << " ,hidden latteViews in memory :::  " << m_waitingLatteViews.size();
 
+    for (const auto view : m_latteViews) {
+        view->disconnectSensitiveSignals();
+    }
+
+    for (const auto view : m_waitingLatteViews) {
+        view->disconnectSensitiveSignals();
+    }
+
     m_unloadedContainmentsIds.clear();
 
     QList<Plasma::Containment *> systrays;

app/view/view.cpp

@@ -230,6 +230,8 @@ void View::init()
     connect(this, &QQuickWindow::heightChanged, this, &View::updateAbsoluteGeometry);
 
     connect(m_corona, &Latte::Corona::availableScreenRectChangedFrom, this, &View::availableScreenRectChangedFrom);
+    //! used in order to disconnect it when it should NOT be called because it creates crashes
+    connect(this, &View::availableScreenRegionChangedFrom, m_corona, &Latte::Corona::availableScreenRegionChangedFrom);
 
     connect(this, &View::byPassWMChanged, this, &View::saveConfig);
     connect(this, &View::isPreferredForShortcutsChanged, this, &View::saveConfig);
@@ -293,6 +295,7 @@ bool View::inDelete() const
 void View::disconnectSensitiveSignals()
 {
     disconnect(m_corona, &Latte::Corona::availableScreenRectChangedFrom, this, &View::availableScreenRectChangedFrom);
+    disconnect(this, &View::availableScreenRegionChangedFrom, m_corona, &Latte::Corona::availableScreenRegionChangedFrom);
     setLayout(nullptr);
 
     if (m_windowsTracker) {
@@ -479,7 +482,7 @@ void View::updateAbsoluteGeometry(bool bypassChecks)
     if (visibility() && corona() && visibility()->mode() == Types::AlwaysVisible) {
         //! main use of BYPASSCKECKS is from Positioner when the view changes screens
         emit m_corona->availableScreenRectChangedFrom(this);
-        emit m_corona->availableScreenRegionChangedFrom(this);
+        emit availableScreenRegionChangedFrom(this);
     }
 }
 

app/view/view.h

@@ -299,6 +299,8 @@ signals:
     void availableScreenRectChangedForViewParts();
     void customPluginsChanged();
 
+    void availableScreenRegionChangedFrom(Latte::View *origin);
+
 private slots:
     void availableScreenRectChangedFrom(View *origin);
     void configViewCreatedFor(Latte::View *view);