Bug fixes

• #3002425: The "Button text" block configuration field is not translatable

Properly handle twig embeds.

Fixed codestyle

** If the module doesn't fix the issue, please try to clean cache manually

- Adding D8.5+ supports
D8.5+ introduced the bug again. It was designed to use the last toolbar item (user tab) to set the default toolbar height. But, D8.5+ renders the user object from bigpipe. It's too late.

- Slim down the duplicated code.
Removing the duplicated code (JS & CSS mainly) from D8.4 changes. Now, it's only introduced JS & CSS for the vertical fixes. This change brings the module more compatible with Core and other modules.

• Code improvements according to Drupal standards.
• Stability fixes.

Skip this version, @see: 8.x-3.1