fix hide ab tag when custom client startup (#8795)

not custom: 'Y', ''
custom: 'Y', 'N'
should not use isNotEmpty

Signed-off-by: 21pages <sunboeasy@gmail.com>

flutter/lib/common/widgets/peer_tab_page.dart

@@ -87,7 +87,7 @@ class _PeerTabPageState extends State<PeerTabPage>
               : PeerUiType.list;
     }
     hideAbTagsPanel.value =
-        bind.mainGetLocalOption(key: kOptionHideAbTagsPanel).isNotEmpty;
+        bind.mainGetLocalOption(key: kOptionHideAbTagsPanel) == 'Y';
     super.initState();
   }