Debugger: Do not pretend

... the preset perspective had an associated debugger.

Change-Id: Icf4f07c5e184530e9c3cee920dcbff9b66066c31
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/debugger/enginemanager.cpp

@@ -254,7 +254,9 @@ QVariant EngineItem::data(int column, int role) const
     } else {
         switch (role) {
         case Qt::DisplayRole:
+            if (column == 0)
                 return EngineManager::tr("Debugger Preset");
+            return QString("-");
         default:
             break;
         }