Change mentions of 'supporter' to 'benefactor'

Change mentions of 'supporter' to 'benefactor' for begunstigers

It is the translation we use in all official documents that was decided upon by the Translacie.

We use several different names for the 'begunstiger' membership type.

Always use 'benefactor' as translation.

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information