Add custom network globe icon is broken in v. 12.0.0

[mogenshoj]

Hello!

I just upgraded to v. 12.0.0 on Windows.

When adding a custom network, and clicking the Chain ID icon, i get this error:

TypeError: Cannot read property 'getChainId' of undefined
    at a.fetchChainId (main.bundle.js:1)
    at Ke (vendor~daa565d3.bundle.js:2)
    at a.n (vendor~daa565d3.bundle.js:2)
    at Ke (vendor~daa565d3.bundle.js:2)
    at a.e.$emit (vendor~daa565d3.bundle.js:2)
    at a.emitDynamicButton (main.bundle.js:1)
    at Ke (vendor~daa565d3.bundle.js:2)
    at HTMLElement.n (vendor~daa565d3.bundle.js:2)
    at HTMLElement.o._wrapper (vendor~daa565d3.bundle.js:2)

I am only able to add the custom network by manually finding and copy/pasting the chain id into the field.

Error seems to be there with both our own sidechain, and e.g. nodes.get-scatter.com

Did something break? :)