improve proportion icon size with automatic icon

--when dock is changing screens and dock is using
an automatic calculated icon size based on contents
the automatic icon size must be recalculated for the
new proportion icon size

app/dockview.cpp

@@ -243,6 +243,8 @@ void DockView::setScreenToFollow(QScreen *screen, bool updateScreenId)
         this->containment()->reactToScreenChange();
 
     syncGeometry();
+
+    emit screenGeometryChanged();
 }
 
 //! the main function which decides if this dock is at the

containment/contents/ui/DebugWindow.qml

@@ -297,7 +297,7 @@ Window{
         }
 
         Text{
-            text: "Proportion Icon Size "+space
+            text: "Icon Size (proportion)"+space
         }
 
         Text{

containment/contents/ui/main.qml

@@ -82,7 +82,8 @@ DragDrop.DropArea {
                                                             root.maxIconSize
 
     property int proportionIconSize: { //icon size based on screen height
-        return (plasmoid.configuration.proportionIconSize===-1) ? -1 : Math.round(Screen.height * plasmoid.configuration.proportionIconSize/100/8)*8;
+        return (plasmoid.configuration.proportionIconSize===-1) || !dock ?
+                    -1 : Math.round(dock.screenGeometry.height * plasmoid.configuration.proportionIconSize/100/8)*8;
     }
 
     property int iconStep: 8
@@ -521,6 +522,11 @@ DragDrop.DropArea {
         }
     }
 
+    onProportionIconSizeChanged: {
+        if (proportionIconSize!==-1)
+            updateAutomaticIconSize();
+    }
+
     //  onIconSizeChanged: console.log("Icon Size Changed:"+iconSize);
 
     Component.onCompleted: {
@@ -1075,6 +1081,19 @@ DragDrop.DropArea {
         }
     }
 
+    Connections {
+        target: dock
+        onWidthChanged:{
+            if (root.isHorizontal && proportionIconSize!==-1)
+                updateAutomaticIconSize();
+        }
+
+        onHeightChanged:{
+            if (root.isVertical && proportionIconSize!==-1)
+                updateAutomaticIconSize();
+        }
+    }
+
 
     ////END interfaces