fix: specify sourceSize as a single prop

So we don't get 2 updates when width/height change

components/images/CachingImage.qml

@@ -9,6 +9,5 @@ Image {
     asynchronous: true
     fillMode: Image.PreserveAspectCrop
     source: IUtils.urlForPath(path, fillMode)
-    sourceSize.width: width
-    sourceSize.height: height
+    sourceSize: Qt.size(width, height)
 }

modules/launcher/items/WallpaperItem.qml

@@ -63,11 +63,9 @@ Item {
         }
 
         CachingImage {
+            anchors.fill: parent
             path: root.modelData.path
             smooth: !root.PathView.view.moving
-            cache: true
-
-            anchors.fill: parent
         }
     }