So, the feature which is reason to delaying release because I thought that it would be easy to make, is...

Local folders
Folders in Telegram were made not long ago, but, of course, they were made with limits, and there aren't enough filters. For example, I've been asked about hiding chats from main list, if they are in folder. Now something similar could be done with local folders.

What is ready at this moment
• New exception types: admin/owner rights (has/hasn't), folder from other chats, not opened in session.
• Discarding limit for name length. You now can write "My unread chats" fully.
• Of course, there is no limit for local folders. Until you hit technical limit, of course, but will you really create 2,147,483,647 folders?

Editing folders from context menu is ready, but it's need to deal with correct order changing, saving from Settings menu (more specifically, show changes after save) and check if it works correctly when changing cloud folders.

Also I think to check if I can to discard chats limit in folder and pinned chats limit. And I'd like to add more icons, because last time I failed.

Why it seemed easy to make for me
I've ran a little test, adding data of another folder to function that receives folders from Telegram servers. And it's worked, folder not just existed in list, but worked like the others. Even exceptions were added pretty quickly. Problem has arised when I've started to convert it to option. And currently I'm on this stage.

I hope that I'll release stable version as soon as possible.