GenericProject: Don't show externally modified dialog for addFiles

Change-Id: I3321e5c51f18388b8a691193159ef7e434971835
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/genericprojectmanager/genericproject.cpp

@@ -148,6 +148,7 @@ bool GenericProject::saveRawFileList(const QStringList &rawFileList)
 
 bool GenericProject::saveRawList(const QStringList &rawList, const QString &fileName)
 {
+    DocumentManager::expectFileChange(fileName);
     // Make sure we can open the file for writing
     Utils::FileSaver saver(fileName, QIODevice::Text);
     if (!saver.hasError()) {
@@ -156,9 +157,9 @@ bool GenericProject::saveRawList(const QStringList &rawList, const QString &file
             stream << filePath << QLatin1Char('\n');
         saver.setResult(&stream);
     }
-    if (!saver.finalize(ICore::mainWindow()))
-        return false;
-    return true;
+    bool result = saver.finalize(ICore::mainWindow());
+    DocumentManager::unexpectFileChange(fileName);
+    return result;
 }
 
 bool GenericProject::addFiles(const QStringList &filePaths)