If you upload a SVG into Kentico Cloud the preview is blank.
Since svg is becoming the very popular file type for the web, you may want to consider a better support in Kentico Cloud.
As an additional goody, you could support limitation of file type in the definition of a content type.
Currently you support number (great) file size (not really that important), but no file type (only PDF files).
And as a goody of the goody, if implementing this feature, you may consider checking the actual file type and not only the extension of the uploaded asset.