Change named exports to default exports for mui icons

This is to reduce transfer size when users load the page for the first time

Change-Id: I3215b7099bcdbea7b446da599810f5951407bbdb
diff --git a/client/src/components/ConversationList.tsx b/client/src/components/ConversationList.tsx
index ee4a36e..f2897b3 100644
--- a/client/src/components/ConversationList.tsx
+++ b/client/src/components/ConversationList.tsx
@@ -15,7 +15,7 @@
  * License along with this program.  If not, see
  * <https://www.gnu.org/licenses/>.
  */
-import { SearchRounded } from '@mui/icons-material';
+import SearchRounded from '@mui/icons-material/SearchRounded';
 import { InputBase, Stack } from '@mui/material';
 import { ChangeEvent, useCallback, useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';