Fixed linter warnings

src/editor/widgets/Autocomplete.js

@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useRef } from 'react'
+import React, { useState, useRef } from 'react'
 import { useCombobox } from 'downshift'
 
 const Autocomplete = props => {
@@ -6,9 +6,6 @@ const Autocomplete = props => {
   const element = useRef();
 
   const [ inputItems, setInputItems ] = useState(props.vocabulary);
-
-  // useEffect(() => 
-  //   element.current?.querySelector('input')?.focus(), []);
   
   const onInputValueChange = ({ inputValue }) => {
     if (inputValue.length > 0) {

src/editor/widgets/comment/CommentWidget.jsx

@@ -67,7 +67,7 @@ const CommentWidget = props => {
       // The current user
       const me = Environment.user;
 
-      return !(me === creator);
+      return me !== creator;
     }
 
     // Global setting as last possible option

src/selection/SelectionHandler.js

@@ -4,7 +4,7 @@ import EventEmitter from 'tiny-emitter';
 const IS_TOUCH = 'ontouchstart' in window || navigator.maxTouchPoints > 0;
 
 const IS_INTERNET_EXPLORER =
-  window?.navigator.userAgent.match(/(MSIE|Trident)/);
+  window?.navigator?.userAgent.match(/(MSIE|Trident)/);
 
 /** Tests whether maybeChildEl is contained in containerEl **/
 const contains = (containerEl, maybeChildEl) => {