Add scale factor setting

[ghost]

Implementation copied from #77

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[schmidp]

This is exactly what I am looking for as well, will this be merged?

[briangann]

it will be merged, just need to test it out to verify it is working as intended

[schmidp]

I have checked out nils-vixel:main on my Mac and ran make -l copied the linux_armv7 to a RPi4:

no scale-factor on config:

1.5:

2.0:

[briangann]

will need to redo this PR, the submitter has deleted their account before signing the CLA

[swilliams-mainstreet]

What still needs to be done here? I would be happy to help - I am new to open-source projects, though.

[wizardofdevops]

https://github.com/grafana/grafana-kiosk/pull/120/files

I just opened another PR since our hero went AWOL.

[briangann]

Fixed by PR #120