Improve External Library Management

Problem

Webform module currently requires a dozen external libraries which provide important UI enhancements. Front-end developers should be able to disable any external library dependency and utilize a contrib or custom enhancement.

Solution

Better document external dependencies and allow webform admins to exclude libraries.

Goals

• Make it possible to disable iCheck integration.
• Make it possible to disable Select2 integration.
• Make it possible to enabled Chosen integration with or without the chosen.module
• Generate Webform.libraires.make.yml and composer.json

Tasks

• Make sure external library names are completely insync.
• Add link to examples for all libraries.
• Move webform.libraries.make.yml info into WebformLibraryManager.
• WebformLibraryManager::attached($build, $library, $require); TRUE|FALSE
• WebformLibraryManager::isEnabled($library);
• WebformLibraryManager::isDisabled($library);
• Add 'Excluded Libraries' to admin settings.
• Update drush webform-libraries to only download supported codebases
• Update \Drupal\webform\WebformElementBase::isEnabled to also check libraries
• Add libraries to WebformElement plugin definition
• Display libraries on 'Select available element types' and elements list page.
• Improve drush webform-libraries commands.