var jq1 = document.createElement("script");
jq1.src = "https://code.jquery.com/jquery-1.12.4.js";
var jq2 = document.createElement("script");
jq2.src = "https://code.jquery.com/ui/1.12.1/jquery-ui.js";
document.body.append(jq1);
document.body.append(jq2);
document.head.innerHTML += '<link rel="stylesheet" type="text/css" href="https://code.jquery.com/ui/1.9.2/themes/base/jquery-ui.css"/>';


^ paste this first
v paste this second


$(".rcs-outer-container")[0].style.zIndex = "10"
$(".rcs-outer-container")[0].style.background = "#292a2a"
$(".rcs-outer-container").resizable({handles: 'n,s,e,w'});