Prefix Tr::tr contexts with ::

To make outliers better visible in Linguist

Change-Id: Ic35ea2a858b7e3576d9a416fb494fddb616eaaa1
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/debugger/console/console.cpp

@@ -257,7 +257,7 @@ void Console::evaluate(const QString &expression)
     } else {
         auto item = new ConsoleItem(
             ConsoleItem::ErrorType,
-            QCoreApplication::translate("Debugger", "Can only evaluate during a debug session."));
+            QCoreApplication::translate("::Debugger", "Can only evaluate during a debug session."));
         m_consoleItemModel->shiftEditableRow();
         printItem(item);
     }