Apply screenScaleFactor to Cura Connect UI

Any pixel size specified in QML should not either use UM.Theme.getSize(), or use screenScaleFactor to make sure the pixel size is as intended on OSX, Windows and Linux regardless of display DPI.

Contributes to CURA-4376

plugins/UM3NetworkPrinting/PrintWindow.qml

@@ -11,8 +11,8 @@ UM.Dialog
 {
     id: base;
 
-    minimumWidth: 500
-    minimumHeight: 140
+    minimumWidth: 500 * screenScaleFactor
+    minimumHeight: 140 * screenScaleFactor
     maximumWidth: minimumWidth
     maximumHeight: minimumHeight
     width: minimumWidth
@@ -31,7 +31,7 @@ UM.Dialog
         anchors.topMargin: UM.Theme.getSize("default_margin").height
         anchors.leftMargin: UM.Theme.getSize("default_margin").width
         anchors.rightMargin: UM.Theme.getSize("default_margin").width
-        height: 50
+        height: 50 * screenScaleFactor
 
         Label
         {
@@ -44,7 +44,7 @@ UM.Dialog
             }
             text: "Printer selection"
             wrapMode: Text.Wrap
-            height: 20
+            height: 20 * screenScaleFactor
         }
 
         ComboBox
@@ -54,7 +54,7 @@ UM.Dialog
             textRole: "friendly_name"
 
             width: parent.width
-            height: 40
+            height: 40 * screenScaleFactor
             Behavior on height { NumberAnimation { duration: 100 } }
 
             onActivated: