Fix GUI/proc on p2p

[jonnyf]

P2P doesn't support GUI procedures such as createCanvas("picture");

Similarly, setting views_list doesn't recreate appropriate windows - because we don't know the type of each view.

Current workaround is to send individual observables such as:

views_list = ["p2pmanager1", "scriptinput2", "picture", "observablelist3"];
view_picture_type = "Canvas2D";
view_scriptinput2_type = "ScriptInput";
view_observablelist3_type = "ObservableList";
view_scriptinput2_tabs = ["PeerExperiment.id(635) > start", "PeerExperiment.id(635) > ACTIVE"];
view_scriptinput2_current = 0;