Feature Request: Stash and Pop

**Is your feature request related to a problem? Please describe.**
When I'm using gitflow and I need the create a feature while having uncommited/unstashed changes, I'm not allowed. When I hit `i`, and try to create a feature I have to cancel, then stash my changes, create the feature and finally pop the stash.

**Describe the solution you'd like**
When I create a feature by using the `i` shortcut, it would be useful to automatically:
- Stash changes using the same name as the branch to be created.
- Create/checkout said branch
- Pop stash

This will allow me to simply hit `i` and create my feature without worrying about unstashed changes.