Fixes cloneMedia and storageClone uniqueness
Fixes cloneMedia and storageClone uniqueness

Currently, cloneMedia retains the same 'filename' as the original. Because of this, storageClone basically does nothing (it tries to copy the file to another file of the same name).

This fix calls fileExistsRename() before cloning, which gives the file a unique filename.

DevFactoryCH/media