Code style cleanup.
Add hooks to section-definitions.php.
Add hooks to section-front-end-helpers.php.
Codestyling.
Remove unnecessary variable.
Code styling.
Add hooks to helpers.php.
Add hooks for helpers-css.php.
Add hooks for helpers-defaults.php.
Allow added CSS rules to be filtered.
Add hooks to helpers-display.php.
Remove deprecated code.
Add hooks for helpers-fonts.php.