Don't display checkboxes for data tags...

..as they can't be (un)checked at all. Might make sense later on
but at the current state of data tag support they're completely useless.

Change-Id: I3b2b79e1d2aa445fcd12d6794151d1833040aa76
Reviewed-by: Niels Weber <niels.weber@theqtcompany.com>

plugins/autotest/testtreeitem.cpp

@@ -101,6 +101,7 @@ QVariant TestTreeItem::data(int /*column*/, int role) const
         case ROOT:
         case TEST_DATAFUNCTION:
         case TEST_SPECIALFUNCTION:
+        case TEST_DATATAG:
             return QVariant();
         case TEST_CLASS:
             return m_name.isEmpty() ? QVariant() : checked();

plugins/autotest/testtreemodel.cpp

@@ -169,6 +169,7 @@ Qt::ItemFlags TestTreeModel::flags(const QModelIndex &index) const
         return Qt::ItemIsEnabled;
     case TestTreeItem::TEST_DATAFUNCTION:
     case TestTreeItem::TEST_SPECIALFUNCTION:
+    case TestTreeItem::TEST_DATATAG:
     default:
         return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
     }