feat: Optimize SCSS architecture.

client/src/containers/Dialogs/JournalNumberDialog/JournalNumberDialogContent.js

@@ -1,4 +1,4 @@
-import React, { useState, useCallback, useEffect } from 'react';
+import React, { useCallback } from 'react';
 import { DialogContent } from 'components';
 import { useQuery, queryCache } from 'react-query';
 
@@ -11,6 +11,8 @@ import withManualJournalsActions from 'containers/Accounting/withManualJournalsA
 
 import { compose, optionsMapToArray } from 'utils';
 
+import 'style/pages/ManualJournal/JournalNumberDialog.scss'
+
 /**
  * Journal number dialog's content.
  */