- client: Fix client Access settings normalization

Close #1820

Squashed commit of the following:

commit 5aadec2e6e126588313ff006d6f95223ba19a526
Merge: a4db6b42 95f41285
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Wed Jul 15 11:15:31 2020 +0300

    Merge branch 'master' into fix/1820

commit a4db6b42ab9cbf43d96c783a72a99e0a2c594108
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Jul 14 19:08:09 2020 +0300

    Remove textarea comma splitting

commit bb34797aac6602b405941dbd90fe6a81b663bb92
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Jul 14 18:21:18 2020 +0300

    Fix client Access settings normalization

commit ac4fb536514f54c5722077d78dbbd981c4e906a8
Merge: 0c758ddc b9fca8d0
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Tue Jul 14 18:14:38 2020 +0300

    Merge branch 'master' into fix/1820

commit 0c758ddcd738136b92e6f947a8068ecc59f7ec25
Merge: 15650db3 f5a1f311
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Fri Jul 3 11:22:00 2020 +0300

    Merge branch 'master' into fix/1820

commit 15650db35323009001fd427a74a312705b54ac86
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Mon Jun 29 12:01:51 2020 +0300

    '- client: Don't normalise disallowed domains'

client/src/components/Settings/Clients/ClientsTable.js

@@ -4,7 +4,7 @@ import { Trans, withTranslation } from 'react-i18next';
 import ReactTable from 'react-table';
 
 import { MODAL_TYPE } from '../../../helpers/constants';
-import { normalizeTextarea } from '../../../helpers/helpers';
+import { splitByNewLine } from '../../../helpers/helpers';
 import Card from '../../ui/Card';
 import Modal from './Modal';
 import CellWrap from '../../ui/CellWrap';
@@ -30,7 +30,7 @@ class ClientsTable extends Component {
             }
 
             if (values.upstreams && typeof values.upstreams === 'string') {
-                config.upstreams = normalizeTextarea(values.upstreams);
+                config.upstreams = splitByNewLine(values.upstreams);
             } else {
                 config.upstreams = [];
             }