The 'application/pgp-keys' MIME type has bad application associations

E.g. .key files are associated with gedit in the browser, and Archive Manager in GNOME. Because of the former, the ‘Importing an OpenPGP key from a website’ scenario is broken in Tails/Jessie since it expects the browser to want to open .key files with “Import Key”.

Related issues

Related to #10889 (closed)
Related to #15213 (closed)
Blocks #7563 (closed)

Original created by @anonym on 10571 (Redmine)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information