Longpress and image menu should include "Share"

[andrewxhill]

Right now, Long Press leads to a "Remove" option, it might be a nice place to include a "Share" which would let you share the image out of Textile into other apps. Either as a raw file or as a link.

cc @asutula @undercase

[undercase]

Will investigate connecting to the native share modules-iOS and android both have UIs that will help us automatically connect to other applications.

[andrewxhill]

tagging this in Sprint 19