There's nothing in that conversation that explains why it "isn't possible", why it's "non-trivial", or why it's "messy", to have a checkbox. If the checkbox was obviously part of the same form as the comment field and the button, it would be obvious that it applied only if you clicked the button, just like the comment field does.
There's nothing in that conversation that explains why it "isn't possible", why it's "non-trivial", or why it's "messy", to have a checkbox. If the checkbox was obviously part of the same form as the comment field and the button, it would be obvious that it applied only if you clicked the button, just like the comment field does.