I've added the SVG file extension for image uploads via
admin/structure/types/manage/image/fields/gallery_image, as you see below:
But when I go to upload an image, I'm still not allowed to upload SVG.
I definitely pressed "Save" in the admin page, and I cleared the cache, and I even see the settings as I wanted them in the database, when I inspect the
field_config_instance table. There must be some other table or cache that's not updating. Any idea?