Form is not fully robust to updating documentation and default tag in rare cases #1098
Description
Describe the bug
As discussed in #1096, there are ways to break the Form updating logic for default struct tags and field documentation.
How to reproduce
If you set the struct of a Form to a struct that is otherwise the same but has different default struct tags or different documentation, it will not update accordingly, since the default tags and documentation are only computed in an init function, which will not be called again if the name, type, and index of the field do not change. That is an exceedingly rare possibility and not worth fixing now, but we should fix it eventually; all of the doc, readOnlyTag, def, hasDef variables etc need to be recomputed every time in every relevant nested closures instead of just being computed once in an init function.
Example code
No response
Relevant output
No response
Platform
macOS