when the controller is open, force panel mode

force to "Windows can cover" when the controller is open: it's the least dangerous mode.
this also disables the struts while the controller is open, this makes panel resize faster
Means the behavior of struts disabling is *INTENDED*
BUG:332187
BUG:332592

src/shell/panelconfigview.cpp

@@ -43,6 +43,8 @@ PanelConfigView::PanelConfigView(Plasma::Containment *containment, PanelView *pa
       m_containment(containment),
       m_panelView(panelView)
 {
+    m_visibilityMode = panelView->visibilityMode();
+    panelView->setVisibilityMode(PanelView::WindowsGoBelow);
     setScreen(panelView->screen());
     connect(panelView, &QWindow::screenChanged, [=](QScreen *screen){setScreen(screen); syncGeometry();});
 
@@ -62,6 +64,7 @@ PanelConfigView::PanelConfigView(Plasma::Containment *containment, PanelView *pa
 
 PanelConfigView::~PanelConfigView()
 {
+    m_panelView->setVisibilityMode(m_visibilityMode);
     PanelShadows::self()->removeWindow(this);
 }
 
@@ -124,4 +127,19 @@ void PanelConfigView::focusOutEvent(QFocusEvent *ev)
     close();
 }
 
+void PanelConfigView::setVisibilityMode(PanelView::VisibilityMode mode)
+{
+    if (m_visibilityMode == mode) {
+        return;
+    }
+
+    m_visibilityMode = mode;
+    emit visibilityModeChanged();
+}
+
+PanelView::VisibilityMode PanelConfigView::visibilityMode() const
+{
+    return m_visibilityMode;
+}
+
 #include "moc_panelconfigview.cpp"

src/shell/panelconfigview.h

@@ -21,6 +21,7 @@
 #define PANELCONFIGVIEW_H
 
 #include "configview.h"
+#include "panelview.h"
 
 #include <QQuickItem>
 #include <QQuickView>
@@ -40,6 +41,7 @@ namespace Plasma {
 class PanelConfigView : public PlasmaQuick::ConfigView
 {
     Q_OBJECT
+    Q_PROPERTY(PanelView::VisibilityMode visibilityMode READ visibilityMode WRITE setVisibilityMode NOTIFY visibilityModeChanged)
 
 public:
     PanelConfigView(Plasma::Containment *interface, PanelView *panelView, QWindow *parent = 0);
@@ -47,6 +49,9 @@ public:
 
     void init();
 
+    PanelView::VisibilityMode visibilityMode() const;
+    void setVisibilityMode(PanelView::VisibilityMode mode);
+
 public Q_SLOTS:
     void showAddWidgetDialog();
     void addPanelSpacer();
@@ -60,9 +65,13 @@ protected Q_SLOTS:
 private Q_SLOTS:
     void updateContrast();
 
+Q_SIGNALS:
+    void visibilityModeChanged();
+
 private:
     Plasma::Containment *m_containment;
     PanelView *m_panelView;
+    PanelView::VisibilityMode m_visibilityMode;
     Plasma::Theme m_theme;
 };
 

src/shell/panelview.cpp

@@ -21,6 +21,7 @@
 #include "panelview.h"
 #include "shellcorona.h"
 #include "panelshadows_p.h"
+#include "panelconfigview.h"
 
 #include <QAction>
 #include <QApplication>

src/shell/panelview.h

@@ -20,11 +20,13 @@
 #define PANELVIEW_H
 
 #include <view.h>
-#include "panelconfigview.h"
 #include <QtCore/qpointer.h>
 #include <Plasma/Theme>
 #include <QTimer>
 
+
+#include <configview.h>
+
 class ShellCorona;
 
 class PanelView : public PlasmaQuick::View