Fix layout of multiply object dialog

resources/qml/Menus/ContextMenu.qml

@@ -114,10 +114,12 @@ Menu
         {
             spacing: UM.Theme.getSize("default_margin").width
 
-            Label
+            UM.Label
             {
                 text: catalog.i18nc("@label", "Number of Copies")
                 anchors.verticalCenter: copiesField.verticalCenter
+                width: contentWidth
+                wrapMode: Text.NoWrap
             }
 
             Cura.SpinBox

resources/qml/SpinBox.qml

@@ -13,8 +13,6 @@ Item
 {
     id: base
 
-    height: spinBox.height
-
     property string prefix: ""
     property string suffix: ""
     property int decimals: 0
@@ -33,7 +31,8 @@ Item
     }
 
     signal editingFinished()
-
+    implicitWidth: spinBox.implicitWidth
+    implicitHeight: spinBox.implicitHeight
     SpinBox
     {
         id: spinBox