jQuery UI MultiSelect Widget

Adds Eric Hynds jQuery UI MultiSelect Widget (https://github.com/ehynds/jquery-ui-multiselect-widget) to select fields (optional multiselect only) in Drupal.

Drupal 8+ Alternatives For Drupal8+ we suggest to use for example:


* https://www.drupal.org/project/choices
* https://www.drupal.org/project/chosen
* https://www.drupal.org/project/select2

with similar functionality and without jQuery dependencies. Also see #3076171: Provide a new library to replace jQuery UI autocomplete for a great comparison.

This jQuery Plugin is great because it offers:

* Small Interface (in contrast to many other multiselects)
* Good usability
* Nice filter options
* Great styling oportunities and beautiful default style
* Configurability
* Integration into Drupals jQuery

Options (easy configuration on administration page):
* Multiple ([multiple=multiple]) selects only (leave single selects untouched)
* Use additional Filter functionality
* JQuery subselector (further filtering by jQuery selector)

Installation and configuration
* Download and extract Eric Hynds's "jQuery UI MultiSelect Widget" jQuery Plugin to the "libraries" folder (sites/all/libraries), named "jquery-ui-multiselect-widget". This folder for example should contain a "src" folder as direct subfolder.
* Download and enable this module
* (Already enabled and working with default settings now!)
* Go to {YourURL}/admin/config/user-interface/jquery_ui_multiselect_widget and configure it
* Done! Happy using!
* Please visit our websites.

Future plans: Add Configuration page containing following options:


* Add further configuration options as described here: http://www.erichynds.com/jquery/jquery-ui-multiselect-widget/
* Use Libraries API

Alternatives:
* http://drupal.org/project/jquery_ui_multiselect (You can find another List of alternatives and explanations here too, thank the maintainer)
* http://drupal.org/project/multiselect
* http://drupal.org/project/improved_multi_select
* http://drupal.org/project/jquery_multiselect
* http://drupal.org/project/fancy_multiselect
* http://drupal.org/project/chosen

Double encoding Problems? ("&" => "&"?) Have a look here: https://github.com/ehynds/jquery-ui-multiselect-widget/issues/424 (This is a bug in the jquery.multiselect.js library file!)

Development proudly sponsored by German Drupal Friends & Companies: webks: websolutions kept simple (https://www.webks.de) and DROWL: Drupalbasierte Lösungen aus Ostwestfalen-Lippe (OWL), Germany (https://www.drowl.de)

Drupal 8 Version Drupal 8 Version by joshirohit100 #2615260: Port "jQuery UI MultiSelect Widget" to Drupal 8