allows scrolling backwards through history

server/src/http/websocket/request.rs

@@ -7,7 +7,13 @@ pub struct RegisterTlmListenerRequest {
     pub minimum_separation_ms: u32,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct UnregisterTlmListenerRequest {
+    pub uuid: String,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize, From)]
 pub enum WebsocketRequest {
     RegisterTlmListener(RegisterTlmListenerRequest),
+    UnregisterTlmListener(UnregisterTlmListenerRequest),
 }