Bug fixes

Issues we worked on:

* editing referenced nodes and entities is now supported
* code cleanup

• As PAReview recommendation use dependency injection for t classes.

• More Clean up and coding standards.

Slick Browser 8.x-2.0-dev, 2020-03-23
-------------------------------------
- Fixed for limited cardinality without AJAX and Media Library button.
- Updated to Blazy:2.0+.
- Added Author Views field for Slick Browser: Media.
- Fixed for single image with hidden Alt and Title fields.
- Added Seven vs. Claro cosmetic compatibility as usual.

Slick Browser 8.x-2.0-dev, 2020-03-01
-------------------------------------
- Added a hook_update() to ensure things are picked up.

• Clean up and coding standards.