[GraphEditor] AttributeItemDelegate: Use MaterialLabel for uncomputed components

Author: cbentejac

meshroom/ui/qml/GraphEditor/AttributeItemDelegate.qml

@@ -233,11 +233,12 @@ RowLayout {
 
         Component {
             id: notComputedComponent
-            Label {
+            MaterialLabel {
                 anchors.fill: parent
                 text: MaterialIcons.do_not_disturb_alt
                 horizontalAlignment: Text.AlignHCenter
                 verticalAlignment: Text.AlignVCenter
+                padding: 4
                 background: Rectangle {
                     anchors.fill: parent
                     border.width: 0