iOS app should incorporate what the Android app does in terms of server sidebar organization.

In the previous updates, iOS app was able to mark server as read by holding down server icon and from the sub menu prompt, mark __all__ channels as read on a server. However, this functionality has been replaced with server organization. https://youtu.be/YaZCIIBPFAU linked is a video depicting the behavior of all versions since 2.4.0(iOS)