devel/jetbrains-webstorm: Update to 2019.2.1

1. Update to 2019.2.1
2. drop dependency on intellij-pt4j port. That port should be removed, it

includes an old pt4j version and the FreeBSD native library is already included
in the upstream pty4j jar

3. small cleanup

PR: 240083
Approved by: thierry (mentor)