Disabled option in button configs doesn't work

[soulostar]

Hi, after trying to use the disabled option and seeing that it wasn't doing anything, I tried to figure out what was wrong and I think that functionality stopped working almost immediately after it was released. I took a look at the code for release 1.6.0 and getButtonElement passes in disabled={data.disabled} to the NavbarButton, but the 1.6.1 release afterwards no longer contains that line. I checked release 2.1 to see if it was added back at some point but it doesn't seem like it was.