Stacked branches

**Is your feature request related to a problem? Please describe.**
Yes, when working with stacked branches, I sometimes need to create a new commit. According to the stacked branches YT video it's only possible to create empty commits and then amend to them.

**Describe the solution you'd like**
A way of creating new commits to branch1. Meaning I'm going into the interactive rebase on the latest commit of the branch and then being able to create a new commit and directly inject the files into the commit.

**Describe alternatives you've considered**
Creating an empty commit with a shortcut while bein in an interactive rebase, then exiting the rebase and amend to the commit. But it's a bit tedious.

For me it would make it way easier/nicer to work with stacked branches, because I sometimes need to add an additional feature to branch1. The normal way was to checkout branch1, add the commit, then checkout branch2 and rebase it again onto branch1.