Make command history editable

I believe there is no way to edit the command history right now, not even manually. I tried to look into the "commands.history" files in the config folder but everything seems to be encrypted.
The use case is that when I typed something wrong, it will be remembered in the history forever and shows up in auto-completion all the time, which is a bit annoying.
It would be nice to make it possible to edit all history commands. Alternatively, it would be intuitive to remove a command by selecting it in auto-completion and pressing DEL.

Start by locating how the commands.history files in the config folder are stored and how command history is exposed through auto-completion. Determine whether the intended behavior is editing all saved commands, deleting a selected command with DEL, or both. Done means the chosen history entries can be changed or removed and no longer appear in auto-completion.

Written by the indexing model from the issue text.