A close button is useful to gecko devs. We should add one for testing.
Created attachment 8557814 [details] [review] add close button to sender Rex, Please review this patch. Thanks.
Comment on attachment 8557814 [details] [review] add close button to sender r=me with one suggestions. Thanks!
merged to master: https://github.com/mozilla-b2g/gaia/commit/17f26246ee75f8eae1399ad78630c9556aaecd75 gaia try is all green: https://treeherder.mozilla.org/ui/#/jobs?repo=gaia-try&revision=96a45bff32e0