Delete the conversation without clearing the entire chat history

It would be better if I can hide the conversation without deleting the entire chat history, like the feature on the iPhone version. Also, even though I mute most of my contacts’ conversations, when I delete the conversation, it will automatically unmute and appear with notification once the person talks to me again, please make it unmuate until I change the setting, Thanks!

CamyTea about LINE, v4.6.2