Add WPML support

[cristianorevil]

Add WPML support for in proxy for instant results

Description of the Change
Actually the proxy doesn't support wmpl. Results of instant search is not filtered by current user language. To add support for wpml in necessary add these lines to proxy.php file at line 353:

foreach ($existing_filter['bool']['must'] as $key => $must_filter) { if ($must_filter['term']['post_lang.keyword'] != null) { $existing_filter['bool']['must'][$key]['term']['post_lang.keyword'] = $_COOKIE['wp-wpml_current_language']; } }

Alternate Designs
None

Possible Drawbacks
None

Verification Process
Pulled the plugin into my WordPress installation and tested the results of instant search.

Checklist:
I have read the CONTRIBUTING document.
My code follows the code style of this project.
My change requires a change to the documentation.
I have updated the documentation accordingly.
I have added tests to cover my change.
All new and existing tests passed.

[andrewmorganmtc]

Is there any update on when this might be reviewed and merged? We are having to manually put in the fix breaking our update path currently.

[felipeelia]

@cristianorevil thanks for the Pull Request but before it can be reviewed, you will need to adjust the code standards to conform with WP's. Do you want to make that change?

@andrewmorganmtc, just to clarify, this repository should be used as a boilerplate. Putting in fixes and adjustments in your version is the expected use of it anyway, okay? Thanks for the comment.