Fix actuator path filter in http traces view while having a

server.servlet.contextPath set

Author: dickerpulli

spring-boot-admin-server-ui/src/main/frontend/views/instances/httptrace/index.vue

@@ -164,7 +164,7 @@
  if (this.instance.registration.managementUrl.includes(this.instance.registration.serviceUrl)) {
  const appendix = this.instance.registration.managementUrl.substring(this.instance.registration.serviceUrl.length);
  if (appendix.length > 0) {
- return `/${appendix}`;
+ return appendix.startsWith('/') ? appendix : `/${appendix}`;
  }
  }
  return null;