[MlMt] Feature wish: execute command by name (command palette?)

[Kai Großjohann]

WIBNI each command had a name, such as "Next Unread Message" or "Next 
Conversation", and there was a key I could press so that I could select 
amongst all the commands by typing letters to filter the list of all 
commands?

Sublime Text calls it the command palette.  Atom has adopted it.  I 
think the JetBrains IDEs also have it.

Of course, OSX has a search field in the Help menu of every application, 
which is nice but not quite the same thing.

Kai