QTIFW should let users escape @@

When user needs to set a value with multiple @s, e.g. email addresses, the string got messed up since everything between @@ gets replaced. Example:

component.setValue("VK","27000@aServer.com;27002@bServer.com"); console.log(component.value("VK")) 

The code above gives 27000bServer.com to console output. Right now, there is no way to escape this @@ replacing. Not backslash, not backslash, not template literal. But user should be able to do it.