Get data from a clipboard client before going into atomic mode. This
correction can avoid an "about to suspend in atomic mode" failure,
particularly if a snip fails to copy correctly.
This drawing bug was that the DC's state wasn't being
initialized all of the way. In particular, the text-mode
wasn't being set and so, in rare occasions, other drawing
code would (legally) leave it in 'solid mode with a non-white
background color also set. Which would cause those two things
to draw incorrectly.
In particular, restore key handling that makes Ctl-Space produce an
event with a Space character. Also, restore `special-option-key`
support, while correcting the documentation to say what
`special-option-key` and `special-control-key` actually do.
Closes PR 14934
Bindings for UCKeyTranslate.
UCKeyTranslate converts a combination of a key-code, a modifier key state, keyboard layout and dead key state to a unicode string.
