Feature Request: No Option to use -c or -C flag with "fixup" command

[hgrias]

From the interactive rebase commands:

# f, fixup [-C | -c] <commit> = like "squash" but keep only the previous
#                    commit's log message, unless -C is used, in which case
#                    keep only this commit's message; -c is same as -C but
#                    opens the editor

Currently, there is no option/keybind to allow us to choose one of these flags when we are using fixup. Will look into creating a keybind for the fixup command, I.e. CRTL-F -> fixup -c and SHIFT-f -> fixup -C