Hanja conversion floats too. The candidates used to be a popup pinned
to the keyboard, which meant a dance to bring a window into existence
when an external keyboard was typing, and a last row that a navigation
bar could sit on. They are a floating panel now, in the same frame as
the keyboard and the code-point pad: drag it, resize it, and it is as
see-through as the floating keyboard's opacity setting says.

The code-point pad is two rows instead of three: the digits, then A-F
with Bksp, Cancel and OK beside them. The row and a half of empty cells
that padded a keyboard-shaped grid around sixteen digits is gone.
