Create a more streamlined way for adding fixup commit messages in the Standard view

I have the "log.useCommitMessage.prefix" low-level property configured to "fixup! ".

Currently to use this to make a fixup commit from the Standard view I currently have to hit the History button to switch to the commit graph, select the commit I want to fixup, and then hit the keyboard shortcut for "Use Message for Commit".

It would be great if this was more streamlined and could be done without switching away from my local files. Ideally the message prefix could be inserted when clicking on a commit message in the mini-log displayed below the commit message field.