#514 Buttons non-intuitive

[Glen]

The button "catchup" is non-intuitive. On the bottom
of the screen it's described as "download only the last
new subscriptions"...but if you've checked some and u
want to download them...THIS is the button u wnat to hit.

There should be another button called "Download
selected podcasts"

It's also really annoying that you have to wait for one
update to be done before u can do any more. When one
is done, it should simply enqueue downloads, and when
you do more, you should just enqueue those behind it.

Thanks, Great Program =)