Position element dialog

Hi UI-Devs,

I have a request: could you please change the container div.el-dialog.classic.data-display-wrapper from margin-top: 15vh to 5vh? Then the dialog would be centered (in Firefox) and would prevent double scrolling (one for the dialog, one for the content).

Thanks in advance

My current solution with Tampermonkey:

(function() {
    'use strict';

    var css = 'div.el-dialog { margin-top: 5vh !important; }',
    head = document.head || document.getElementsByTagName('head')[0],
    style = document.createElement('style');


    style.type = 'text/css';
    if (style.styleSheet){
        // This is required for IE8 and below.
        style.styleSheet.cssText = css;
    } else {