Code cleanup and integration with the JQuery Colorpicker module.

Changes since last release:

Changes since 8.x-1.0-alpha5:

• #3004762 by nedjo: Trait should use relevant service for non-default config collections

Main changes since last release:

• #2849976 by bmcclure: Allow customization of modal size
• #2955557 by shmel210, bmcclure: Library core/drupal.ajax is not attached on page
• #2991099 by RumyanaRuseva: JS error on successful login if user/login is not opened through ajax

New to 7.x-2.5 - Regression fixes related to changes brought in with 7.x-2.4 (only affected some installs, should be resolved with this release):