Have mailto: link in "Email a new issue to this project"

Description

When on a smartphone, it is almost impossible to select address for emailing issues.

Proposal

Have a mailto link in addition to the text box, so you can immediately summon up a draft email inside your email application with the address pre-filled.

Design

note: icon color of email button should be the same as the copy-to-clipboard button.

Links / references

Documentation blurb