Log in on mobile Devices via QR-Code

When logged in, on PC it is annoying to type in Log-in Data again, when using mobile Devices. A QR-Code implementent Token with a dynamic unique Login-Dataset would make the usage of mobile Devices much easier. This QR-Code should be displayed either in a new category (my Devices) on the sidepanel or on the Start-Screen of the website. Furthermore it should be implemented in the PC-Client (my Devices) for a more convenient User-Experience.