[doc] Pass field to value callback in FieldsForm example This avoids a deprecation warning when following the documentation.

[pkg] prepare 3.18.2

[migractions] Don't silently ignore errors when installing sql procedures If we're going to ignore errors, at least be loud about it. sqlexec already wraps the sql execution in a try/except block, so we were never going to catch any exceptions in the caller. Check the return value instead. Closes #3459618.

[schema] execute the new stored procs/funcs at migration time (closes #3450368)