[containment] Clean up QML & JavaScript code

components/containmentlayoutmanager/qml/ConfigOverlayWithHandles.qml

@@ -46,10 +46,10 @@ ContainmentLayoutManager.ConfigOverlay {
         }
 
         onUpdated: {
-            var minX;
+            let minX;
-            var minY;
+            let minY;
-            var maxX;
+            let maxX;
-            var maxY;
+            let maxY;
 
             if (point1.pressed && point2.pressed) {
                 minX = Math.min(point1.sceneX, point2.sceneX);
@@ -64,7 +64,7 @@ ContainmentLayoutManager.ConfigOverlay {
                 maxY = -1;
             }
 
-            if (pinching == (point1.pressed && point2.pressed)) {
+            if (pinching === (point1.pressed && point2.pressed)) {
                 overlay.itemContainer.x += minX - previousMinX;
                 overlay.itemContainer.y += minY - previousMinY;
 
@@ -87,7 +87,7 @@ ContainmentLayoutManager.ConfigOverlay {
             }
             overlay.itemContainer.layout.positionItem(overlay.itemContainer);
             overlay.itemContainer.layout.hidePlaceHolder();
-            pinching = false
+            pinching = false;
         }
         onCanceled: released()
     }
@@ -149,4 +149,3 @@ ContainmentLayoutManager.ConfigOverlay {
         }
     }
 }
-