Apologies if this isn't in the correct location (it's my first post to the forums).
I'm posting this to hopefully help save other people the time and frustration that I went through:
I just received a win10 Dell Precision 7710 () with a 4K (2160) display. After getting things dialed in how I liked I went to use Solidworks and my icons were missing from the Feature Manager Design Tree (see attachment: Not OK at 2160.jpg). I suspected a driver issue but this showed up the same even when running in software openGL. It seems the root cause is running your scale setting at 175% with a native 4K resolution on the built in display (see attachment: scale setting.jpg). Running at 100/150/200% scaling seems to remedy the situation as does running in 1080 resolution.
Dell Precision 7710
Intel XEON E3-1505M with smart card and TB3
Win 10 64 Bit
AMD FirePro W7170M (driver: 15.201.2401-151104a-296421C-Dell)
17.3" UHD IGZO (3840x2160) LED