It seems that -[MTLCommandBuffer presentDrawable:] doesn't
immediately replace the previous drawable on screen so I
assume that there is some default minimum display time for
drawables.
LibreOffice only invokes this method in a timer so let
LibreOffice control the rate of window updates by presenting
the drawable right now.
Change-Id: Ibd8d72bd6ea0303f9582264791cc4356bda62c13
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/176879
Reviewed-by: Patrick Luby <guibomacdev@gmail.com>
Tested-by: Jenkins
