CLAP + Bitwig => no UI

[p0nce]

basically - bitwig doesn't use show/hide, it expects you to open the UI in set_parent here's my impl: https://gist.github.com/wrl/5f8c3f7ba6c91dcfc451627d1d5cd0e1#file-clap_adapter-stpl-c-L1054-L1108 here's what you're doing: https://github.com/AuburnSounds/Dplug/blob/master/clap/dplug/clap/client.d#L1349-L1379 i asked for clarification on this a few times and was told that the ui should open in set_parent