Custom css 'selector' for all breakpoints

Prerequisites • I have searched for similar features requests in both open and closed tickets and cannot find a duplicate. • The feature is still missing in the latest stable version of Elementor ( Elementor Pro ) What problem is your feature request going to solve? Please describe. When adding custom css, it's always hard to get the breakpoints correct. Different websites could use different breakpoints or the breakpoints might change. Most (non-developer) users also don't know how to write a css media queries for a display size. Describe the solution you'd like I found it's rather easy to extend the magic css 'selector' prefix with others. I suggest to add the breakpoints to these functions (add_post_css, add_page_settings_css in /elementor-pro/modules/custom-css/module.php) Code change required is minimal: This allows a user to write media queries this way, which seems users friendly to me Describe alternatives you'…