MacOS standard key command opt+up/down and opt+shift+up/down don't work

[ryanjamurphy]

I have figured out how to provide these keyboard shortcuts with a new third-party plugin.

New plugin: macOS-like alt+(shift)+↑ and alt+(shift)+↓ keyboard navigation

It does what it says on the tin: [A quick demo] Find it in the in-app plugin gallery or on GitHub.