When specified it will skip any issues that were not modified in the specified
time period even if they are owned by the user.

R=tandrii@chromium.org

Change-Id: I230c8fa6cbc517c32edb8618a831a62ec6e45405
Reviewed-on: https://chromium-review.googlesource.com/978170Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Sergiy Byelozyorov <sergiyb@chromium.org>