PLT-486: Remove spell check feature from input boxes during signup flow

Add spellcheck="false" attribute to login and signup form inputs

web/react/components/password_reset_form.jsx

@@ -69,6 +69,7 @@ export default class PasswordResetForm extends React.Component {
                                 name='password'
                                 ref='password'
                                 placeholder='Password'
+                                spellCheck='false'
                             />
                         </div>
                         {error}