If the subprocess was trying to write to its stdout/stderr, its process
would never actually finish because it was blocked waiting for us to read
it, but we were blocked on waitpid(). Instead, use waitpid(WNOHANG) and
continually read from the subprocess (which should be a blocking operation)
until it exits.
I think some connections you'll want to optimize for latency, and others for
bandwidth. Probably.
Also, use a dropdown box instead of a checkbox; that way we can make it more
clear what each of the settings means.
While we're here, adjust all the anchor settings for the different display
items so that resizing the dialog box works sensibly.
Just kidding. This is a squash of a whole bunch of unlabeled temporary
commits that I produced over the last couple of weeks while writing a UI
for MacOS while riding on airplanes and sitting in airports.
So long, batch of useless commits!
