R devel - Sep 2018 - Bug report: problems with saving plots on a Windows PC with 4k monitor - wrong picture size

Steps to reproduce the problem:

win.metafile("myplot.wmf",height=3,width=5)
plot(1:9)
dev.off()


Details:
When I try to save plots as WMF or EMF pictures specifying small picture size,
e.g.., 3x5 inches, I get a wrong size of the WMF/EMF picture. The plot itself
resides in the left upper corner of the picture.
I use a 4k monitor, there are no problems with 1920x1080 monitors.

One must turn off "display scaling for higher DPI settings" for RGui
to make it work correctly:

"Right-click the R shortcut on your desktop, then select Properties from
the menu.
Once the Properties window is up, go to the Compatibility tab.
You will see a 'Disable display scaling on high DPI' option.
"

That works for 32-bit RGui version only, since 64-bit RGui is considered as a
native application.

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