CMS should not rename items that are uploaded for gallery/assets.

For example, hippo.gif should not be replaced with hippogif

Because of the 'clean' urls, the cms by default cleans node names. I think this shouldn't be the case for binaries. This namely results in links in the frontends like

/binaries/assets/hippopdf and
/binaries/gallery/hippojpg

By default, I think it would be better not to clean the names for binaries.

Changes introduced with CMS7-4183 (fixed in 2.12.15)

SW: do not strip the dot character for documents, images and assets.