GUI2/Chatbox: fixed close button being shown for lobby tab when reloa…

…ding log

Fixes #2992.

src/gui/widgets/chatbox.cpp

@@ -95,11 +95,13 @@ void chatbox::finalize_setup()
 void chatbox::load_log(std::map<std::string, chatroom_log>& log, bool show_lobby)
 {
 	for(const auto& l : log) {
-		if(!show_lobby && l.first == "lobby" && !l.second.whisper) {
+		const bool is_lobby = l.first == "lobby";
+
+		if(!show_lobby && is_lobby && !l.second.whisper) {
 			continue;
 		}
 
-		find_or_create_window(l.first, l.second.whisper, true, true, l.second.log);
+		find_or_create_window(l.first, l.second.whisper, true, !is_lobby, l.second.log);
 	}
 
 	log_ = &log;