Render correct Rich viewer for binary files
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Before supporting the binary files, the only deviation from the standard text snippets were markdown files. And those were presented with the rich viewer that has been using [the markdown field viewer](app/assets/javascripts/vue_shared/components/markdown/field_view.vue).
After starting the support for different sorts of binary blobs, we should be more flexible and provide support for at least basic types like images, pdf files, etc.
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