[core] tdf#138122 Add window scaling for retina displays on macOS

[Ilmari Lauhakangas]

On 20.4.2021 19.55, Noel Grandin wrote:
> Those git.libreoffice.org <http://git.libreoffice.org> links don't seem 
> to lead to the right commits?

It's true that when clicking from Gerrit, they lead to the wrong 
commits, so some problem with Gerrit's linkification and the trailing ^!

It seems to be safer to use links of this form (I commented in the patch 
in order to test):

https://git.libreoffice.org/core/commit/6b8c157a0b4f37a09fdbf656919b2df06a3abc3e

https://git.libreoffice.org/core/commit/076da4cd9d61adf15942a7bfc350bd0d268f64f1

Ilmari