Drop running booru fetch and alert on fetch error

dots/.config/quickshell/ii/services/Booru.qml

@@ -399,6 +399,9 @@ Singleton {
             }
             else if (xhr.readyState === XMLHttpRequest.DONE) {
                 console.log("[Booru] Request failed with status: " + xhr.status)
+                newResponse.message = root.failMessage
+                root.runningRequests--;
+                root.responses = [...root.responses, newResponse]
             }
             root.responseFinished()
         }