FR: Persist recent command history

[justyns]

When you open the command palette and run a command, that gets saved in recentCommands. But if you reload the page/pwa/open a new window, recentCommands is empty again.

I'd like it if recentCommands could be persisted either to disk or client localstorage so that it is always there.

I haven't looked at the code around this, but I assume there'd also need to be a limit to the number of commands stored and a way for users to clear it.