Fix bug where management page doesn't give option to subscribe to all comments

Hi

Sorry if I'm going about this all the wrong way. First time on GitHub and not an experienced coder.

Here's the bug I had.
When I was going to the manage subscriptions page as a user, I was only getting the following Action options:
Delete, Suspend, Replies to my comments, Activate

I think an option is missing that allows the user to set themselves to receiving All comments.

So I edited the two files author.php and user.php in the templates folder and I think that fixes the problem.

Hope that's of some use...