Qt linguist CODECFORTR option in Visual Studio add-in

I am developing Qt application using Visual Studio and Qt Visual Studio Add-in. I am using non-Latin1 characters in my source code, so I need to specify CODECFORTR in .pro file for QtLinguist to display it correctly. But VS add-in doesn't create .pro file, it provided only "lupdate all files" and "lrelease all file" options in project context menu.
There is a need for such options in project settings or somewhere else.