Kill JIRA Banner and Hover Indentation

userscript.js

// ==UserScript==
// @name         No JIRA banner or Hover Indentation
// @namespace    http://rpetri.ch/
// @version      0.1
// @description  Remove JIRA announcement banners; Remove comment relayout on hover
// @author       Ryan Petrich
// @match        https://*.atlassian.net/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    const style = document.createElement("style");
    style.innerText = "#announcement-banner { display: none!important } .issue-data-block:hover, .issue-data-block.focused { padding-left: 10px!important }";
    document.head.appendChild(style);
})();