Provide feedback when generating forms using Wikifunctions

[nikkiwd]

When using Wikifunctions to generate forms, it doesn't provide any feedback. It's not possible to tell whether it's being slow, whether it's done and hadn't generated anything, and if it hadn't generated anything, why it didn't.

It could display something next to the buttons to indicate that it's working, e.g.

This could change to "done!", "no forms generated", "an error occurred" or something once it's finished.