v3.18.3

Fixes

• Fixed a bug where the Thread reply list could duplicate the oldest reply when scrolling to the top
• Fixed a bug where Thread replies could appear in the wrong thread, show a stale reply count, or not update correctly after switching threads
• Fixed a bug where a locally sent, resent, or deleted Thread reply was not always reflected in the reply list
• Fixed a bug where the Thread composer was not disabled after the parent channel was deleted