Awesome work @jp0550! You are on a roll! 
I tried to do some preliminary testing but encountered some generic errors (UI and pistons were unaffected. However the error did popup on every page-load). Despite doing a hard reload, clearing the cache and even trying it in incognito mode, I couldn't get rid of this.
However, I am pretty certain that this is an issue with my setup itself and can be easily resolved. Hope to test around a bit more tomorrow and then update the opening post with yet another set of great fixes from you!
In the meanwhile, I exchanged some messages with Robin, who has spoken to the webCoRE maintainers
to get their buy-in on letting us merge our patches, directly on their GitHub. This is as long as the patches are non-destructive patches. This would help us in avoid the hassle of maintaining a separate branch at our end.
I did get some basics ready for making our existing webCoRE patches non-destructive.
Now to move on to actually updating all the patches.
