Text editor like indentation / Indent in place

Hi all!

I would like to have a new shortcut to perform indentation like a text editor.
That is, turn the current node into a children but NOT recursively indent all its children.

It’s easier to explain with an example. I start from:

a
b
   c

Right now, if press tab (indent) on the second row, I get:

a
   b
      c

Which is nice in many occasions.

However, sometimes I want a quick shortcut to get:

a
   b
   c

that is, act like a text editor (not an outliner)

As a side note, you have already implemented the “unindent like a text editor” with
Unindent item in place option.