Autosave additions

issue #4259, issue #1413

- decrease timeout by 1 sec
- really actually turn off nprogress
Truncate metatitle and url when > 70 characters

Closes #4301
Set link[prev/next] tag to https if urlSSL is set

The <link> tag for next/previous in the head doesn't update when the normal URL and the urlSSL change. This fixes that bug.

Fixes #4266
Merge pull request #4304 from jillesme/master

Set link [prev/next] tag to https if urlSSL is set.
Merge pull request #4303 from ErisDS/pr-4259

Autosave additions
Merge pull request #4302 from jaswilli/issue-4301

Truncate with ellipsis when metatitle > 70 chars
Auto-save changes

Refs #4259
- Auto-save new post when title loses focus.
- If a post has '(Untitled)' for a title, regenerate slugs
  on all title changes--same behavior as a new post that does
  not yet have a slug.
- Adjust some functional tests to handle the automatic transition
  from editor/new to editor/editor and the URL changes that go
  along with it.