Is it possible to edit the Alt-underline shortcuts’ list inside the Launcher Menu (opened when pressing Super/Windows key)? Currently not all buttons have that option available.
For example the button “Shut down” gets the letter “h” underlined when “Alt” is pressed down, indicating that <Alt+h> will trigger it. However the “Sleep” button does not have such indicator.
These aren’t user-editable. But it’s strange that Sleep doesn’t get an underline; this works for me with current git master. Maybe it got fixed recently; I recall seeing a commit recently to fix mnemonics (that’s what these are called) in certain contexts.