debugger: show at least "elide" markers for thread ids

Task-number: QTCREATORBUG-6110
Change-Id: I439fc6463c42fce134646c620ac19a5c533217fe
Reviewed-on: http://codereview.qt-project.org/5123
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/debugger/threadshandler.cpp

@@ -178,7 +178,7 @@ QVariant ThreadsHandler::headerData
         return QVariant();
     switch (section) {
     case ThreadData::IdColumn:
-        return QString(QLatin1String("  ") + tr("Id"));
+        return QString(QLatin1String("  ") + tr("Id") + QLatin1String("  "));
     case ThreadData::FunctionColumn:
         return tr("Function");
     case ThreadData::FileColumn: