Fix buttons shuffle and clear in queue card

htdocs/js/mpd.js

@@ -954,6 +954,14 @@ function updatePlayIcon(obj) {
     }    
 }
 
+function shuffleQueue() {
+    sendAPI({"cmd":"MPD_API_SEND_SHUFFLE"});
+}
+
+function clearQueue() {
+    sendAPI({"cmd":"MPD_API_RM_ALL"});
+}
+
 function sendAPI(request, callback) {
     $.ajax({url: "/api", contentType:"application/json", method: "POST", data: JSON.stringify(request), success: callback });
 }