Last used commands feature

[marrrcin]

It will be a nice to have feature:

1. User opens launcher (Ctrl+Space)
2. User presses arrow down
3. Last 5 (or configurable number) of commands appear in the list

It is important that the last commands will be stored globally, so switching to another Sitecore instance will prevent the command list.

[alan-null]

It is important that the last commands will be stored globally, so switching to another Sitecore instance will prevent the command list.

I will register this as an improvement.