How to set tabs in TinyMCE?

Question

HTML

Pressing Tab exits the editing window. How to make normal tabulation?
I found this solution for text fields:
webew.ru/articles/811.webew
But in TinyMCE it doesn't work that way, it creates an iframe from a text field. I tried to run a function inside it (frame) from a link with a solution, but nothing happened, I couldn’t master JS :(
Perhaps everything can be done much easier?
upd: inserting a tab character " & nbsp ; " works like a regular space

Answer 1

Enter a tab character in any offline text editor, copy to clipboard, paste into the TinyMCE window using Ctrl+V.
In reality, there are no texts where tabulation is really needed.