fix android show chat overly out of remote page

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/models/chat_model.dart

@@ -234,6 +234,7 @@ class ChatModel with ChangeNotifier {
   }
 
   showChatPage(int id) async {
+    if (isDesktop) {
       if (isConnManager) {
         if (!_isShowCMChatPage) {
           await toggleCMChatPage(id);
@@ -243,6 +244,13 @@ class ChatModel with ChangeNotifier {
           await toggleChatOverlay();
         }
       }
+    } else {
+      if (id == clientModeID) {
+        if (_isChatOverlayHide()) {
+          await toggleChatOverlay();
+        }
+      }
+    }
   }
 
   toggleCMChatPage(int id) async {