Fix wrong server address used in password popup when redirected

Always use the server address from the network client to reconnect to the correct server after being disconnected due to wrong password. The password popup is only shown after being disconnected, so the server address of the network client should always the address of the server which the client should reconnect to with the password. Using `ui_server_address` was causing the wrong address to be used after being redirected to another server and if the config variable is changed while the password popup is open.

Closes ddnet#8260.

src/game/client/components/menus.cpp

@@ -1433,7 +1433,9 @@ void CMenus::RenderPopupFullscreen(CUIRect Screen)
 		static CButtonContainer s_ButtonTryAgain;
 		if(DoButton_Menu(&s_ButtonTryAgain, Localize("Try again"), 0, &TryAgain) || Ui()->ConsumeHotkey(CUi::HOTKEY_ENTER))
 		{
-			Client()->Connect(g_Config.m_UiServerAddress, g_Config.m_Password);
+			char aAddr[NETADDR_MAXSTRSIZE];
+			net_addr_str(&Client()->ServerAddress(), aAddr, sizeof(aAddr), true);
+			Client()->Connect(aAddr, g_Config.m_Password);
 		}
 
 		Box.HSplitBottom(60.f, &Box, &Part);