Cease use of livequery() function in core appplications

Run comment autosave on document ready
Livequery was not needed in this case but was used as a means of deferring
the execution of the `autosave()` function as the load order was wrong.
`autosave.js` is now instead loaded before `discussion.js` to fix this
issue.

Don't use livequery for autogrow on textareas
Instead attach it at document ready and then again whenever one of the
specified events are fired.

Attach autgrow only on document ready on post pages
Since there are no dynamically loaded textareas on the "Post" pages, we
can attach autogrow as soon as the document is ready and not worry about
having to attach it again later on.

Run discussion autosave on document ready (similar to 81007d3)

Attach autogrow on document ready on conversation pages

Don't use livequery for toggling draft delete buttons on hover
This currently assumes that new drafts aren't added dynamically to the
drafts list.

Nuke draft delete button toggling

Don't use livequery for hiding password reset input in dashboard

`.MorePager` should never be using livequery

Remove unneeded code (activity delete button toggling)

Safeguard against `autogrow()` not being available

Safeguard against `autosave()` not being available