When using a laptop with a certain scale connected to two external monitors of a different scale in a configuration like this (two external monitors side-by-side with the laptop display below them situated halfway between):

display2 | display3

        display1

and the scale of the laptop display is a different scale than the external displays, context menus on display2/display3 can show up in the wrong position. Whether the issue reproduces on display2 or display3 seems to depend on which display logically comes first when Windows enumerates displays.

My repro:

MacBook Pro Intel

Display 1: Internal Retina display @ 250% scaling

Display 2 and 3: 4k monitors of the same model @150% scaling

1. Lay out the monitors with the external monitors side-by-side and the laptop display underneath them halfway
2. Open Unity and try both of the following (only one will repro):

## Put Unity in monitor 2 with hierarchy in the right pane and right-click on the hierarchy view close the the right edge of the display
## Put Unity in monitor 3 with hierarchy in the left pane and right-click on the hierarchy view close to the left edge of the display

Result: In one of the two scenarios, the context menu pops on the wrong monitor

Expected: Should pop up wherever the mouse pointer is