[cv][ui] improve glance-ability of successful submission messages.
[cv][ui] improve glance-ability of successful submission messages.

Although I really like oxford comma, I think having a list of bullet
points is better.

Also, only add message about pending CLs if there are a few.

R=robertocn

Motivation:
https://luci-change-verifier.appspot.com/ui/run/infra/8988974035854-1-585e5698d7570d44
Change-Id: Idbb2d5e0a34994d71e36c90d2f259234695b327d
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/3215988
Auto-Submit: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@google.com>
Reviewed-by: Yiwei Zhang <50b2a565e2e78c292794832469a30ce5abc9959c@google.com>
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@google.com>

luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go,luci/luci-go