Please make adjusting handlers bigger on hi resolution screens

Hello,

Please refer to the attached pictures. When 4k monitors are used, it is extremely difficult to operate with handlers located in Blend If panel and Hue/Saturation adjustment layer. In order to drag handlers to make selection range wider, I have to struggle with placing mouse cursor over handler with a pixel precission. Usually a couple of times I try to catch small icon of end of range. It is really frustrating. 

I have foung quickly 2 places where this problem is especially annoying. Mostlikely there are more places worth to improve.