Disabling page scrolling when opening the Modal in Oxygen

Copy and paste this script into the javascript section of each Modal:

/*jQuery Watch Plugin
@author Darcy Clarke
@version 2.0
Copyright (c) 2012 Darcy Clarke
Dual licensed under the MIT and GPL licenses.*/
(function(e){e.fn.watch=function(t,n,r){var i=document.createElement("div");var s=window.MutationObserver||window.WebKitMutationObserver||window.MozMutationObserver;var o=window.CustomEvent||function(){return arguments||{}};var u=function(e,t){e="on"+e;var n=e in t;if(!n){t.setAttribute(e,"return;");n=typeof t[e]=="function"}return n};if(typeof n=="function"){r=n;n={}}if(typeof r!="function")r=function(){};n=e.extend({},{throttle:10},n);var a=function(t){var n=this;e.each(this.watching,function(){var e=this;var r=false;var i;for(var s=0;s<e.props.length;s++){i=t[0].attributes[e.props[s]]||t.css(e.props[s]);if(e.vals[s]!=i){e.vals[s]=i;r=true;break}}if(r&&e.callback)e.callback.call(n,new o("AttrChange"))})};return this.each(function(){var o=this;var f=e(this);var l={props:t.split(" "),vals:[],changed:[],callback:r};e.each(l.props,function(e){l.vals[e]=f[0].attributes[l.props[e]]||f.css(l.props[e]);l.changed[e]=false});if(!this.watching)this.watching=[];this.watching.push(l);if(s){var c=new s(function(e){e.forEach(function(e){r.call(o,e)})});c.observe(this,{subtree:false,attributes:true})}else if(u("DOMAttrModified",i)){f.on("DOMAttrModified",r)}else if(u("propertychange",i)){f.on("propertychange",r)}else{setInterval(function(){a.call(o,f)},n.throttle)}})}})(jQuery);

jQuery(document).ready(function($){$('.oxygen-builder-body .oxy-modal-backdrop').css('height','auto');if($('html').attr('ng-app')=='CTFrontendBuilder') return;function scrollbarWidth(){var block = $('<div>').css({'height':'50px','width':'50px'}),indicator=$('<div>').css({'height':'200px'});$('body').append(block.append(indicator));var w1=$('div',block).innerWidth();block.css('overflow-y','scroll');var w2=$('div',block).innerWidth();$(block).remove();return (w1 - w2);}var bg=$('#%%ELEMENT_ID%%').parent('.oxy-modal-backdrop'),backsize=$(bg).height();function fixflex(){var backpos=$(bg).css('align-items'),screenh=$(window).height(),barh=$('#wpadminbar').height();$(bg).css({'height':'calc(100% - '+barh+'px)','top':+barh+'px'});if(backsize>screenh){if($(bg).hasClass('right')){$(bg).css('align-items','flex-end');$(bg).css('justify-content','flex-start');}else if($(bg).hasClass('left')){$(bg).css('justify-content','flex-start');}else{$(bg).css('align-items','flex-start');}}else{if($(bg).hasClass('right')){$(bg).css('justify-content','center');}else if($(bg).hasClass('left')){$(bg).css('justify-content','center');}else{$(bg).css('align-items',backpos);}}}$(window).resize(function(event){fixflex();});fixflex();if(typeof $().watch=='function'){$(bg).watch('display',function(){if($(this).css('display')=='flex'){$('body').css({'overflow-y':'hidden','height':'100%','position':'relative','margin-right':scrollbarWidth()+'px'});$(this).css('overflow-y','auto');$('.oxy-sticky-header-active').css('padding-right',scrollbarWidth()+'px');if($('#%%ELEMENT_ID%%[data-aos*="left"]')){$(bg).css('overflow-x','hidden');}}else if($(this).css('display')=='none'){$('.oxy-modal-backdrop').removeClass("live");setTimeout(function(){$('body').css({'overflow-y':'auto','margin-right':'0'});$('.oxy-sticky-header-active').css('padding-right','0');},300);}});}});