Boxx Technologies Inc., a computing systems designer, has been sold by one Dallas private equity firm to another. The Austin company that was previously owned by Capital Southwest Corp. (Nasdaq: CSWC) has been bought by Craftsman Capital Partners, according to a Tuesday announcement. Financial terms of the deal were not disclosed. Boxx Technologies, which was founded as Digital Emulsion Inc. in 1996 in Phoenix, designs computing systems for designers and visual effects professionals. It relocated...