QR code scan time entry

[matthew-shaw]

Is your feature request related to a problem? Please describe.
I keep forgetting to press the button when I arrive at work. If there was a QR code on my desk to scan, that would remind me to do it!

Describe the solution you'd like
A QR code unique to my account that automatically starts/stops a time entry whenever scanned.

Describe alternatives you've considered
Post-it notes keep dropping off my monitor 😢

Additional context
If I was less lazy I'd actually remember to click a single button, but here we are...