Utilize UIMenu popups on iOS in some spots

[hawkrives]

See https://github.com/dominicstop/react-native-ios-context-menu

[hawkrives]

We may need to maintain our own fork, as this one seems to have stalled ~10 months ago.

[drewvolz]

Until we're ready to tackle this, would it make sense to move this to discussions and out of issues?

[hawkrives]

Sure, that sounds good! (GH mobile doesn't have that button yet. Do you mind switching it?)

[drewvolz]

iOS dependency was added to the repo in #5955.