"room stats" command needs some more love

[ArcticEcho]

Given an example output of the room stats command,

2 members (2% of this room's able reviewers) have processed 29 review items today, which accounts for 2.28% of all CV reviews today.

"2% of this room's able reviewers" isn't clear, especially in conjunction with the preceding "2 members". It seems like 'members' and 'able reviewers' are referring to the same group (though they're not).

I'm a glutton for information so to me it'd be great if Closey would spit out detailed information about each group of people, their percentages, their memberships, etc., but I don't know if that's really the most efficient way; and most people probably don't care for all that info.

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^{Paraphrased from Tyler's messages.}