SimpleChatTCRV:CleanUp: Refresh chat ui, if user empty submits

This ensures that the tool call edit/trigger is reshown, when user
submits a empty response and the logic stops from going ahead.

tools/server/public_simplechat/simplechat.js

@@ -1518,6 +1518,7 @@ class MultiChatUI {
         } else {
             if (content.trim() == "") {
                 this.elInUser.placeholder = "dont forget to enter a message, before submitting to ai"
+                this.chat_show(chatId)
                 return;
             }
             try {