v0.9.3.9 - AMD/OpenCL fixes

[p]OpenCL UI inspect crash fixed, now UI more stable on AMD[/p]
[p]GCN arch compatibility restored (RX 500, Vega), was broken last month[/p]
[p]RDNA arch fixed (RX 6000,7000,9000)[/p]
[p]still only 1/3 of normal FPS on RDNA (RX 6000,7000,9000)[/p]
[p]so use smaller scenes starting 25K on newer AMD cards[/p]
[p]also better nVidia performance in OpenCL mode[/p][p][/p][p][/p]