- client: Don't normalise disallowed domains

Close #1820

Squashed commit of the following:

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/Dns/Access/Form.js

@@ -46,7 +46,7 @@ const Form = (props) => {
             type="text"
             className="form-control form-control--textarea font-monospace"
             disabled={disabled}
-            normalizeOnBlur={normalizeMultiline}
+            normalizeOnBlur={id === 'disallowed_clients' ? normalizeMultiline : undefined}
         />
     </div>;