Issue with retina HDPI screen (OSX)

[Algiane]

Hi the ISCD team,

On retina HDPI screen the pixel density is twice the resolution, leading to issues with openGL functions that takes pixels dimensions as arguments (refs: this discussion or this official doc of apple).

In Medit, it creates multiple issues :

1. Mesh is displayed using a quarter of the window size. Rescaling the window allows to solve the issue (temporary).

2. Clicking in a given area of the window picks entities in a different region (wrong x,y coordinates).

3. Using windows linking (Alt-c / Alt-l) and zooming unzooming creates different sizes between mesh dislaying.

I will try to propose an admissible fix for this (but I am not expert in graphical stuff).
Best Regards,

Algiane