Version 3.0.3

Assorted bug fixes and UI improvements today.

Major Changes:
- Generating a segment will now use the *displayed* story segments, *not* the canon story segments. The previous way was confusing some users, including me, so we've changed it.
- Segments that are regenerated or extended will now try to match the next displayed segment -- that is, they will try to fit in to what comes after them in the story, rather than going off in a new direction. It's not perfect though!

Minor Changes:
- Lots of bugfixes related to deleting segments -- they should now clearly be displayed as deleted without refreshing, and a number of issues related to being logged in or out displaying weird state on the user's side have been resolved.
- You can now move in_review chapters back to draft.
- The reviewing process has been streamlined, it's easier for us to read and review unpublished stories now.
- The text box when editing a segment's content now displays at the same size as the initial amount of text in that segment.
- The max length the AI will generate has been increased.