Refactor FormBuilder#has_many by extracting methods.
Refactor FormBuilder, replacing form_buffers with Arbre components.  See PR #3486 for discussion.
Remove form_buffer from filters form.
Fix active_admin_comments now that active_admin_form_for is a nested Arbre component.
Fix new password form, we can no longer break up active admin form in an ERB template.
Remove duplicate copy of test.
Formtastic + Arbre: will it blend?
Update documentation for forms including Arbre.
Merge pull request #3486 from varyonic/2542-arbe-buffering-inside-aa-forms

Convert active_admin_form_for to Arbre component - resolves #2542
on table index column block add sortable column by default
add #3075 to changelog
sort by default only by table column names

do not sort by associations or virtual attributes
Merge pull request #3075 from dmitry/table_sortable_default_true

Column block on table index should be sortable by default