Add an Option to Remove All Object from Stream

[gouldingken]

I often want to be able to replace the whole stream with the current selection. What I currently have to do is a) turn on all layers b) select everything in the whole file c) click "remove" in Speckle d) repeat my selection and hit "add". It's workable but tedious. Maybe a simple option in the dropdown to remove all objects from the stream would be a reasonable solution...