center align numeric columns

platform/qt/dmxwidget/widgetmodel.cpp

@@ -99,8 +99,14 @@ QVariant WidgetModel::data(const QModelIndex &index, int role) const
             return QVariant();
         }
     }
-    case Qt::FontRole:
-        return QVariant();
+    case Qt::TextAlignmentRole:
+        switch (static_cast<Column>(index.column())) {
+        case SerialNumber:
+        case FirmwareVersion:
+            return Qt::AlignHCenter;
+        default:
+            return QVariant();
+        }
     case Qt::EditRole:
         return QVariant::fromValue(widgets_.at(index.row()).get());
     default: