This fixes#2092, a long-standing bug where on macOS resizing the window
results in a garbled display.
It seems the seemingly optional child()->makeCurrent call is actually
required on macOS. Enabling it in all cases fixes the resize issue.
The OS will render the widgets using the system screen DPI (instead of
being locked at @1x resolution).
This has no impact on the existing high-DPI rendering code in Citra,
which means that the resolution of the emulated content is increased
to the real number of pixels, as on other platforms.
Instead of letting CMake re-generate an automatic Info.plist file on
every build, use our own. This allows greater control on the application
bundle settings.
Pierre de La Morinerie