Incidentally, I've just tested SAP GUI 7.30 Compilation 1, patch level 8 - that does not display grey text in 'Connections' tab - it's black as I would expect.
So, the problem/feature of the grey text in 'Connections' tab has been introduced somewhere between 7.30 Compilation 1 patch 8 and 7.30 Compilation 3 patch 9.