Fix line-collision on wrapped header titles
batch actions allow add a proc to form parameter.
fix: title_bar makeup - only direct child link gets rounded borders
fix expect value in filter_form_builder_spec
Fix has_many form rendering with new_record: false

Fixes #2773
Merge pull request #2831 from shekibobo/2773-fix-has-many-new-record

Fix has_many form rendering with new_record: false
disallow Kaminari 0.15.0

this prevents users from running into #2537
use latest bundler so Travis works with Ruby 2.1.0
Merge pull request #2830 from YETI-switch/master

fix expect value in filter_form_builder_spec
provide a more robust fix to prevent filter conditions from being deleted

This was spurred on by #2832, and effectively replaces #2523.

TL;DR it was the filter form's problem, so the resource extension
shouldn't have been trying to compensate.
Merge pull request #2814 from sandrew/2813-resource-action_item-makeup-fix-for-dropdown_meny

Resource action_item makeup fix for dropdown_menu
fix regression in 4dd5b105

Ref: #2523, #2832
Allow to duplicate 'Batch Actions' button at the bottom

Switches 'Batch Actions' button selector from ID-based to class-based which allows to use multiple (duplicated) batch buttons. Duplicating button at the bottom speeds up batch operations on large tables (user don't have to scroll back to the top).

The following monkey-patch put into `app/config/initializers/active_admin.rb` does the trick:

```ruby
module ActiveAdmin
  module Views
    module Pages
      class Index
        def main_content
          wrap_with_batch_action_form do
            build_table_tools
            build_collection
            build_table_tools
          end
        end
      end
    end
  end
end
```

`e.preventDefault()` is needed to prevent browser's default behavior when clicking on link with `href='#'` - it scrolls to the top
Merge pull request #2838 from AndreyChernyh/f/multi-batch-buttons

Allow to duplicate 'Batch Actions' button at the bottom
Just a small addition, so now we can remuve multiple filters inline
added unit test
Add better loking template for registrations#new view for admin users. Locale for English and Polish is added.
Merge pull request #2852 from avelexvi/2835-exclude-specific-filters

Just a small addition, so now we can remove multiple filters inline
Merge pull request #2855 from krzysztofbialek/#2790

Properly styled registrations#new template for admin users
Revert "make CSV downloads respect pagination"

This reverts commit a8ad4f989caec3a9ffbc820a949f309d2ce1a832.

Ref: #2847