CKEditor FULL for OC 2.0-3.0

v.5.0.8_4.20.0 (2022-10-06)
* updated CKEditor to v.4.20.0
* HTML entities settings for greek and latin symbols
* unicode emoji plugin (requires utf8mb4 DB and tables encoding)
!!! IMPORTANT !!! Upgrade steps:
1. Uninstall old extension version in Extensions->Installer
2. Make sure 'admin\view\javascript\clicker_ckeditor' folder is empty or absent
3. Install new version