This is fantastic, thanks so much! It’s a great addition and I love the customization we’re able to add.
I did notice an issue or perhaps a misconfiguration on my part. When highlighting text to share as a quote, the mini tool bar wants to list every custom share icon I added and it won’t fit. I tried to scroll and arrow over, but it’s just cut off. Not a show stopper, but maybe of interest to the devs.
I jumped over to share quote buttons but it doesn’t look like I can add or remove anything there.
Tip:
For anyone that wants to implement this, but with social networks not on the list. Make sure you read Replace Discourse's default SVG icons with custom icons in a theme and How to overrule a color variable for one theme only? - #7 by smrtey which will walk you through configuring about.json, that’s key so you can add the icons-sprite.svg file!
If you want to replace share icons, this thread is your friend, Use standard share icon for share post (instead of link icon) - #9 by bquast 