I was thinking about exactly this sort of feature a while back! I thought about including it in a big future overhaul that I might eventually do, but now that there's demand for it, I can see including it in a future update :)
I will say quick, depending on how you name your files, I designed Impart such that if your image files and CSP files have the same name (ie, MyCoolArt.png and MyCoolArt.clip), they should automatically get bundled together such that the CSP files are hidden by default. That said, if you use a different naming scheme or store your clip files in a different folder, then that whole system falls apart lol. Either way, I can understand not wanting source files in the system at all, so I can definitely see adding this in the future!