UX improvement: Add a link to the github repo on https://app.briskine.com/list

[DanKaplanSES]

Why we need it

• At the moment, it takes me a lot of steps to figure out how to create a github issue because I look for a link to github on https://app.briskine.com/list until I've looked/clicked enough to conclude it's not there, then do a Google search to find it.

What we need

• Perhaps a link to the github repo could be placed in this menu:

[ghinda]

We've added details about the open source license, and GitHub links, in the Help Center: https://help.briskine.com/