Remove wrapping div with inline styles for hidden form fields.

We are dropping HTML 4.01 and XHTML strict compliance since input
tags directly inside a form are valid HTML5, and the absense of
inline styles help in validating for Content Security Policy.
Provide interface for accessing underlying IO object

In some cases users may need to work with/manipulate more of the
Tempfile api than provided by Upload. Allow users to get at the
underlying io via the common to_io method of IO/IO-like objects
[skip ci] Reorder i18n guide

Currently, the section called "How to store your custom translations"
has several subheadings that make no sense, such as "Translations for
ActiveRecord models." These make more sense under the "Overview of the
I18n API Features" section. I moved the "How to store..." section down
to the more appropriate sub-headings "Using Different Backends" and
"Using Different Exception Handlers" and removed the "Customize your
i18n setup" header.
[ci skip] Added examples for color_field_tag method
Merge pull request #14771 from heironimus/i18n_guide_reorder

Reorder i18n guide
Merge pull request #14779 from zenati/master

[ci skip] Added examples for color_field_tag method
[ci skip] Added examples for search_field_tag method
Merge pull request #14780 from zenati/master

[ci skip] Added examples for search_field_tag method
[ci skip] Added examples for telephone_field_tag method
[ci skip] Added examples for url_field_tag method
Merge pull request #14781 from zenati/master

[ci skip] Added examples for telephone_field_tag and url_field_tag methods
Autoload ActiveModel::StrictValidationFailed

Currently, if environment doesn’t eager load code, invoking this
constant before calling #valid? on a model instance results in a
NameError.
Merge pull request #14783 from hakanensari/autoload-strict-validation-failed

Autoload ActiveModel::StrictValidationFailed
Bring SQLite3Adpter init API closer to others
Merge pull request #14788 from arthurnn/conn_adpt_api

Bring SQLite3Adpter init API closer to others
Merge pull request #14755 from timlinquist/to_io_http_upload

Use common to_io so users can access the underlying IO object
Implement to_io as an alias
Change the method description
Add CHANGELOG entry for #14755 [ci skip]
Merge pull request #14738 from tilsammans/pull/11407

Remove wrapping div with inline styles for hidden form fields.

Conflicts:
	actionview/CHANGELOG.md