The preview API should use text/plain for SVG unless asked for explicitely (cherry picked from commit 69e2aad)
The preview API should use text/plain for SVG unless asked for explicitely
(cherry picked from commit 69e2aad)

patman15/galleryplus,leftees/galleryplus,leftees/galleryplus,patman15/galleryplus,patman15/galleryplus,leftees/galleryplus