Issue #2841957 by daften: Using the source compression level does not work
Issue #2832152 by cebasqueira: Colorbox Drupal code standards not followed
Issue #2832141 by cebasqueira: Add a documentation for colorbox on a help
Issue #2814045 by heddn: composer.json issue in latest dev and 1.2.0
Issue #2816949 by Roshni Patel, amklose: Typo in field widget settings
Added token browser ui if the token module is installed, as in the Drupal 7 version.
Issue #2692235 by kruhak: Tokens in custom caption/gallery not being replaced
Updated for Drupal 8.2.0.
Issue #2647776: Add the setting for returnFocus
Issue #2772005: Fix coding standards, part 1.
Minor spelling fix in settings form.
Issue #2771213: Cant change "Device with" for the "Mobile detection"
Fix d.o. links in json file to use https and www.
Issue #2714631 by thebruce: Consider composer library support
Issue #2755773 by Sam152: Replacing t function with $this->t in class file
Issue #2755773 by Chandan Chaudhary: Replacing t function with $this->t in class file
Issue #2755779 by ron_s: $field['bundles'] is empty for files
Issue #2756237 by Sonal.Sangale: Remove @file tag docblock from all the .php files
Use "data-colorbox-gallery" if set otherwise use "rel".
Increased the minimum required version of the Colorbox plugin to 1.6.1 just to make people upgrade.
Issue #2572961 by NickWilde: Drush automatic download of colorbox plugin on enable.
Issue #2711571 by rudiedirkx: Language in theme_colorbox_imagefield() must be an object
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