Using the "joomla.content.icons" JLayout for article and feature view

## Issue
Currently we use this layout already in the com_content category view. It's a nice way to replace the current "actions" dropdown menu (that one with "print", "email" and "edit" icons) within a template without overriding the whole page output.

## Testing
1. Make sure the dropdown menu looks the same before and after patch
2. Test if you can override the dropdown menu using a template override (copy the layout from /layouts/joomla/content/icons.php to /templates/your_template/html/layouts/joomla/content/icons.php and adjust)