new: FIFO list impl

lib/view/page/server/edit.dart

@@ -409,7 +409,6 @@ class _ServerEditPageState extends State<ServerEditPage> {
 
   Widget _buildFAB() {
     return FloatingActionButton(
-      heroTag: 'server',
       onPressed: _onSave,
       child: const Icon(Icons.save),
     );

lib/view/page/server/tab.dart

@@ -69,7 +69,6 @@ class _ServerPageState extends State<ServerPage>
       floatingActionButton: FloatingActionButton(
         onPressed: () => AppRoute.serverEdit().go(context),
         tooltip: l10n.addAServer,
-        heroTag: 'server',
         child: const Icon(Icons.add),
       ),
     );

lib/view/page/ssh/tab.dart

@@ -48,7 +48,6 @@ class _SSHTabPageState extends State<SSHTabPage>
           return FloatingActionButton(
             onPressed: () => AppRoute.serverEdit().go(context),
             tooltip: l10n.addAServer,
-            heroTag: 'server',
             child: const Icon(Icons.add),
           );
         },