Added 404 page + Improvements.

src/componets/AddItem.js

@@ -1,5 +1,5 @@
 import { useState } from 'react';
-import '../styles/AddItem.css';
+import '../styles/SendItem.css';
 import TagSelection from './TagSelection';
 import addItem from '../modules/send';
 
@@ -38,13 +38,13 @@ const AddItem = ({onExit, reFetch, tags, SetLoader}) => {
       <fieldset className='box'>
         <legend >New bookmark</legend>
         <div className='AddItem-content'>
+          <h3><span style={{color:"red"}}>* </span>Link:</h3>
+          <input onChange={SetLink} className="AddItem-input" type="search" placeholder="e.g. https://example.com/"/>
           <h3>Name:</h3>
           <input onChange={SetName} className="AddItem-input" type="search" placeholder="e.g. Example Tutorial"/>
-          <h3>Link:</h3>
-          <input onChange={SetLink} className="AddItem-input" type="search" placeholder="e.g. https://example.com/"/>
           <h3>Tags:</h3>
           <TagSelection setTags={SetTags} tags={tags} />
-          <button onClick={newItem} className="upload-btn">Upload &#xf093;</button>
+          <button onClick={newItem} className="send-btn">Add &#xf067;</button>
         </div>
       </fieldset>
     </>