Apply screenScaleFactor to image size

Contributes to CURA-8689

resources/qml/WelcomePages/AddUltimakerPrinter.qml

@@ -42,8 +42,8 @@ Control
             Image
             {
                 source: UM.Theme.getImage("add_printer")
-                Layout.preferredWidth: 200
-                Layout.preferredHeight: 200
+                Layout.preferredWidth: 200 * screenScaleFactor
+                Layout.preferredHeight: 200 * screenScaleFactor
             }
 
             ColumnLayout
@@ -119,4 +119,4 @@ Control
             }
         }
     }
-}
+}

resources/qml/WelcomePages/PrinterCard.qml

@@ -67,8 +67,8 @@ Control
         {
             id: image
             source: imageSource
-            width: 180
-            height: 180
+            width: 180 * screenScaleFactor
+            height: 180 * screenScaleFactor
             sourceSize.width: width
             sourceSize.height: height
         }