Boolean attributes use status tag by default
Add formtastic translations to German locale

See #1724 for the underlying problem. formtastic keys are already present in some of the locales (es, es-MX, pl, and zh-CN), so I'm adding them to de as well.
Merge pull request #2941 from cschramm/patch-1

Add formtastic translations to German locale
Fix incorrect translation
removed batch action route for controllers with batch actions disabled
Merge pull request #2943 from brunojabs/2942-fix-incorrect-translation-pt

Fix incorrect translation in portuguese
Merge pull request #2944 from betesh/remove_batch_action_routes_for_controllers_with_batch_actions_disabled

removed batch action route for controllers with batch actions disabled
Merge branch '#2619' of https://github.com/krzysztofbialek/active_admin

Conflicts:
	lib/active_admin/views/components/table_for.rb
	spec/unit/views/components/table_for_spec.rb
update `is_boolean?` not to barf on arbitrary objects
update tests to use expect() syntax
provide default colors for #2753
Add missing devise labels to de locale
Merge pull request #2947 from cschramm/patch-2

Add missing devise labels to de locale
Add documentation about scopes and a note about filters

[ci skip]

Also fix some formatting issues.
Merge pull request #2948 from shekibobo/docs/add-filter-and-scope-docs

Add documentation about scopes and a note about filters
In has_many nested form, give new elements same classes than existing.
Merge branch 'master' into kenzai
Merge branch 'has_many_fields-html-classes' into kenzai

Conflicts:
	lib/active_admin/form_builder.rb