Use popups for prediction
The input_popup interface was designed for CJK languages to display a prediction near the text input.
The protocol is finalized, but there's no implementation yet, so this would affect both the keyboard and the compositor.
It might be useful for non-CJK text prediction as well.
Needs #7 (closed) and #71 , as well as copious design.
Edited by Dorota Czaplejewicz