refactor: Update MessagesPage component to allow editing of "Text" field

Allow the "Text" field in the MessagesPage component to be editable along with the "Sender Name" and "Message" fields. This change improves the functionality of the component and provides a better user experience.

src/frontend/src/pages/SettingsPage/pages/messagesPage/index.tsx

@@ -56,7 +56,7 @@ export default function MessagesPage() {
           onCellEditRequest={(event) => {
             handleUpdateMessage(event);
           }}
-          editable={["Sender Name", "Message"]}
+          editable={["Sender Name", "Message", "Text"]}
           overlayNoRowsTemplate="No data available"
           onSelectionChanged={(event: SelectionChangedEvent) => {
             setSelectedRows(