ContextualPane clicking through views too fast before they render will cause backups and hangs in JSD

[rjackey]

Clicking through different views in a tree more quickly than they render will cause things to hang. It looks like callbacks may get queued and lock things up.

There are some dependencies on:

• deactivateView_Private calling drawnow
• launchView trying to set a blocking progress dlg
• docking the figure window