chore: Adjust chat details button design

lib/pages/chat_details/chat_details_view.dart

@@ -208,7 +208,6 @@ class ChatDetailsView extends StatelessWidget {
                           ],
                         ),
                         Divider(color: theme.dividerColor),
-                        if (!room.canChangeStateEvent(EventTypes.RoomTopic))
                         ListTile(
                           title: Text(
                             L10n.of(context).chatDescription,
@@ -217,23 +216,14 @@ class ChatDetailsView extends StatelessWidget {
                               fontWeight: FontWeight.bold,
                             ),
                           ),
-                          )
+                          trailing: room
-                        else
+                                  .canChangeStateEvent(EventTypes.RoomTopic)
-                          Padding(
+                              ? IconButton(
-                            padding: const EdgeInsets.all(16.0),
-                            child: TextButton.icon(
                                   onPressed: controller.setTopicAction,
-                              label: Text(L10n.of(context).setChatDescription),
+                                  tooltip: L10n.of(context).setChatDescription,
                                   icon: const Icon(Icons.edit_outlined),
-                              style: TextButton.styleFrom(
+                                )
-                                iconColor:
+                              : null,
-                                    theme.colorScheme.onSecondaryContainer,
-                                backgroundColor:
-                                    theme.colorScheme.secondaryContainer,
-                                foregroundColor:
-                                    theme.colorScheme.onSecondaryContainer,
-                              ),
-                            ),
                         ),
                         Padding(
                           padding: const EdgeInsets.symmetric(