fix: linux, flutter, workaround freeze (#10324)

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/mobile/pages/file_manager_page.dart

@@ -225,7 +225,7 @@ class _FileManagerPageState extends State<FileManagerPage> {
                                   errorText: errorText,
                                 ),
                                 controller: name,
-                              ),
+                              ).workaroundFreezeLinuxMint(),
                             ],
                           ),
                           actions: [

flutter/lib/mobile/pages/remote_page.dart

@@ -604,7 +604,7 @@ class _RemotePageState extends State<RemotePage> with WidgetsBindingObserver {
                       // ko/zh/ja input method: the button will trigger `onKeyEvent`
                       //                     and the event will not popup if `KeyEventResult.handled` is returned.
                       onChanged: handleSoftKeyboardInput,
-                    ),
+                    ).workaroundFreezeLinuxMint(),
             ),
           ];
           if (showCursorPaint) {