- now we position the ajax response

Little bit of CSS to position the ajax response div so that it looks
sane.

Then of course we hide it because we don't want a spinner just spinning
there all the time to confuse the user.
- adding a response cycle for the user

Now we have a way to show the user that thinsg are happening and we are
providing proper feedback to them about what just happened.
- correction of the conditional

Previously it would always pass on the $_POST value since it's actually
captured but with nothing in it.

Now we are also checking to see if it's empty and if it is we don't save
it because why would we save a task with no actual task in it.?