Make GCode TextField scrollable

CURA-6057

resources/qml/MachineSettings/GcodeTextArea.qml

@@ -44,15 +44,18 @@ UM.TooltipArea
         renderType: Text.NativeRendering
     }
 
-    TextArea
+    ScrollView
     {
-        id: gcodeTextArea
         anchors.top: titleLabel.bottom
         anchors.topMargin: UM.Theme.getSize("default_margin").height
         anchors.bottom: parent.bottom
         anchors.left: parent.left
         anchors.right: parent.right
 
+        TextArea
+        {
+            id: gcodeTextArea
+
             hoverEnabled: true
             selectByMouse: true
 
@@ -86,3 +89,4 @@ UM.TooltipArea
             }
         }
     }
+}