improve settings window behavior onlostfocus

-- and fix a crash from immutabilityChanged from
settings window

app/nowdockconfigview.cpp

@@ -51,10 +51,10 @@ NowDockConfigView::NowDockConfigView(Plasma::Containment *containment, NowDockVi
         syncSlideEffect();
     });
     
-    //containment->setLocation(Plasma::Types::LeftEdge);
+    connect(containment, &Plasma::Containment::immutabilityChanged, this, &NowDockConfigView::immutabilityChanged);
     /*   connect(containment, &Plasma::Containment::immutabilityChanged
        , [&](Plasma::Types::ImmutabilityType type) {
-        if (type != Plasma::Types::Mutable && isVisible())
+           if (type != Plasma::Types::Mutable && this && isVisible())
                hide();
        });*/
 }
@@ -196,12 +196,22 @@ void NowDockConfigView::hideEvent(QHideEvent *ev)
 
 void NowDockConfigView::focusOutEvent(QFocusEvent *ev)
 {
+    //FIXME: I can understand why we need to hide on focus out
     Q_UNUSED(ev);
     const auto *focusWindow = qGuiApp->focusWindow();
     
     if (focusWindow && focusWindow->flags().testFlag(Qt::Popup))
         return;
 
+
+    // hide();
+}
+
+void NowDockConfigView::immutabilityChanged(Plasma::Types::ImmutabilityType type)
+{
+    if (type != Plasma::Types::Mutable && isVisible()) {
         hide();
     }
+}
+
 // kate: indent-mode cstyle; indent-width 4; replace-tabs on;

app/nowdockconfigview.h

@@ -21,6 +21,7 @@
 #define NOWDOCKCONFIGVIEW_H
 
 #include "plasmaquick/configview.h"
+#include <plasma/package.h>
 
 #include <QObject>
 #include <QWindow>
@@ -30,6 +31,7 @@
 namespace Plasma {
 class Applet;
 class Containment;
+class Types;
 }
 
 class NowDockView;
@@ -52,6 +54,9 @@ protected:
     void syncGeometry();
     void syncSlideEffect();
 
+private Q_SLOTS:
+    void immutabilityChanged(Plasma::Types::ImmutabilityType type);
+    
 private:
     Plasma::Containment *m_containment{nullptr};
     QPointer<NowDockView> m_dockView;