Improve initial macosx device scale#18274

Closed

dopplershift wants to merge 2 commits intomatplotlib:mainfrom

dopplershift:mac-device-scale

Commits on Aug 15, 2020

Improve initial setting of device_scale on macosx backend (Fixes #18213)
dopplershift
committed

Commits on Aug 16, 2020

Revert "Skip test_interactive_backend on macOS Travis."
dopplershift
committed