Currently it is not possible to reach the interactive contents of a revision popup by using the keyboard only. Since all interactive elements should be reachable via keyboard, we should change that.
Open question: Which key would make sense? Tab or space? --> Check how similar use cases are handled in OOUI.
Implemented as a MVP solution:
- When the user focuses a pointer, the tooltip is displayed.
- The Tab key can be used to navigate into a popup and out of it again.