好友列表：在线灰亮与置顶排序

-- 错误：纯字典序，在线好友沉底难寻
table.sort(list, function(a, b)
    return a.name < b.name
end)

local function sortFriends(list)
    table.sort(list, function(a, b)
        if a.online ~= b.online then
            return a.online
        end
        return a.name < b.name
    end)
end
local function refreshRow(row, f)
    row.icon:setGray(not f.online)
    row.name:setString(f.name)
end