Uploading a pdf does not set hippo:filename property

Uploading a pdf as asset does not set hippo:filename property, while subsequent re-upload from the document edit screen does.

Reproduction:

• Go to https://cms.demo.onehippo.com/content/path/content/assets/pdf/
• Upload attached Test PDF 1.pdf

Result:
node /content/assets/pdf/test-pdf-1.pdf/test-pdf-1.pdf/hippogallery:asset does not have hippo:filename=Test PDF 1.pdf

Probable fix:
org.hippoecm.frontend.plugins.gallery.model.DefaultGalleryProcessor#makeImage should add fileName as extra parameter in the call to ResourceHelper.setDefaultResourceProperties.