"Off" option for GitHub position is not showing up in Grav Admin
It seems to me that "off" option for GitHub position is not processed correctly by Grav Admin and not shown in combobox. Can you do anything about it or should I log issue with Grav Admin directly? Thanks.

I see it fine in the latest release. Tested the RTFM skeleton 🤔

Not for me... Took actual plain RTFM-skeleton from getgrav.org, no changes, except bin/gpm install admin, update to Learn2 installed via Admin and that option is still not there... :thinking:
Fedora 25 Server Apache 2.4.25 PHP 7.0.15
Grav v1.1.15 Admin v1.2.10 Learn2 v1.6.3
The user/themes/learn2/blueprints.yaml file contains the "Off" option?
Yup...

If you change "off" to something else, does it work? Anyone else can replicate the issue?
Yes, those two other options work just fine.
I mean, if you change off: Off to offtest: Offtest for example, does it work? To check if it's the specific string causing the problem
Changing it to offtest: Offtest works. Reverting back to off: Off doesn't.
I know I am a bit late, but @rbukovansky you can edit the yaml file in user/config/themes/learn2.yaml (make it if it doesn't exist) and add the following text:
top_level_version: false
home_url:
github:
enabled: false
position: off
tree: https://github.com/getgrav/grav-skeleton-rtfm-site/blob/develop/
commits: https://github.com/getgrav/grav-skeleton-rtfm-site/commits/develop/
Ensure that the text after position is off. There you go!