Feature request: Please add text identation options to editor's preferences

```
It would be very helpful if we were able to choose identation method: use tabs 
or spaces, and ability to select displayed width for tabs (in spaces mode 
editor should insert this amount of spaces on pressing Tab key). See Eclipse's 
Settings > General > Editor > Text Editors    as example.


```

Original issue reported on code.google.com by `m.nesov` on 14 Sep 2010 at 8:29
