Bug 911412 - [Buri][fugu][Language][Email]The view the attachment Button...

... is truncated

https://bugzilla.mozilla.org/show_bug.cgi?id=911412

Added view button that is provided from UX and adjusted positions in-line with download icon
See the accessibility comment, and then also make sure the images have been passed through `tools/png_recompress.sh` to make sure they are at their smallest size.