added user blocking support

removeBlocked.js

'use strict';
(function() {
  var styleOverrides = [
    // remove blocked users messages automagically.
    ".message-group-blocked { display:none; }"
  ];

  var style = document.getElementsByClassName("guildlistOverrideStyle")[0];
  if (!style) {
    style = document.createElement("style");
    style.className = "guildlistOverrideStyle";
    document.head.appendChild(style);
  }
  [].slice.apply(style.sheet.rules || []).forEach(r => style.sheet.removeRule(r));
  styleOverrides.forEach(s => style.sheet.insertRule(s, 0));
})();