Toggle numerical and non-numerical list

[Gerqus]

Hi!
How about having a hotkey to change current list level between different styles, like numbered, dashed, lettered?
So let's say I have:

1. first
2. second
  1. second first
  2. second second |
    1. second second first
3. third
  1. third first

Where cursor is denoted here by |.

My proposition is: if user hits hotkey for changing list style, I'd expect the result to be:

1. first
2. second
  - second first
  - second second |
    1. second second first
3. third
  1. third first

Hit again and we have

1. first
2. second
  a) second first
  b) second second |
    1. second second first
3. third
  1. third first

Hit again and we are back to initial state of 1., 2., ... and the circle goes on indefinitely. Other option is to let users assign specific hotkeys to specific styling (like. alt+ctrl+1 makes list numerical, alt+ctrl+- makes it dashed, alt+ctrl+a listed by letters and so on, configurable of course)

I'd start with these three standard ones for simplicity of development.

For circulating hotkey variant optionally give user possibility to add own enumeration styles, or expand the predefined list with option to select those styles that should be circled through.
For one style - one hotkey variant it's self explanatory.

What are your opinions?

[Gerqus]

This also aligns nicely with #396