Auto-close compose box after auto-opening

[alya]

As reported on CZO, a UX issue appeared when we started auto-restoring drafts:

1. Go to a DM thread with a saved draft. The compose box is automatically opened (because it's a DM thread), and the draft is populated.
2. Go to another DM thread.

Previously, the compose box would automatically switch to the new conversation, which was good. Now, because there is content in the compose box, it doesn't do so. So you end up in a state where your conversation is faded, and you're looking at a draft for another conversation you might have had no intention to engage with.

To address this, we should treat the compose box as having been closed, not open, when the user navigates to a new view if:

• The compose box auto-opened, and
• The user hasn't made any changes to the message content or addressee.

The result will be that in the situation described above, the compose box will switch to a new message in the conversation the user navigated to, same as before the auto-restore feature. This will also make it possible to experiment with auto-opening the compose box in more situations.

CZO thread