Replace usage of controls label with our custom label

This prevents copy pasting a bunch of parameters that we set by default

resources/qml/ObjectItemButton.qml

@@ -4,7 +4,7 @@
 import QtQuick 2.10
 import QtQuick.Controls 2.3
 
-import UM 1.1 as UM
+import UM 1.5 as UM
 import Cura 1.0 as Cura
 
 Button
@@ -56,7 +56,7 @@ Button
             visible: showExtruderSwatches && extruderColor != ""
         }
 
-        Label
+        UM.Label
         {
             id: buttonText
             anchors
@@ -67,12 +67,9 @@ Button
                 verticalCenter: parent.verticalCenter
             }
             text: objectItemButton.text
-            font: UM.Theme.getFont("default")
             color: UM.Theme.getColor("text_scene")
             opacity: (outsideBuildArea) ? 0.5 : 1.0
             visible: text != ""
-            renderType: Text.NativeRendering
-            verticalAlignment: Text.AlignVCenter
             elide: Text.ElideRight
         }