Create branch from "staged changes"

[EloB]

The feature I'm after is a way to create a branch from "Staged Changes" where you can choose another base.

For instance if you find unrelated work to your current task. It would be nice to be able to "staged ranges" then click a button "Create branch from with Staged Changes".

What is should do:

1. Create a "temporary commit" of staged changes.
2. Stash everything else.
3. Checkout the provided "FROM" branch.
4. Create branch with the name you provided.
5. Cherry pick the "temporary commit".
6. Push that new branch (maybe optional by menu selections).
7. Go back to the previous branch and pop stash.
8. Remove the temporary commit from this branch.

So you can continue on what you are working on.