iMac Retina OS.get_screen_dpi() incorrect in 3.2.3 release

[JayHiserote]

Version 3.2.3

iMac Retina 27 inch, Late 2015 (5120x2880)
MacOs Catalina 10.15.7

My application under development in Godot 3.2.1 reports an OS.get_screen_dpi() = 217
After installing 3.2.3 my application reports an OS.get_screen_dpi() = 144

Allow Hidpi is on in the project's display settings.

I believe the dpi value reported in 3.2.1 (217) is correct.

[akien-mga]

CC @bruvzg

[bruvzg]

Indeed, is seems to return 144 for all displays with scale != 1 and 72 for scale == 1, I messed it up in #40084 cause 144 is correct for my display, but previous version of code seems to return completely inaccurate values as well.