Problem: Haiku: no full-screen support
Solution: Add support for toggling full-screen using the keyboard
(rymdbar)
Makes toggling using keyboard possible. This change does not add any
`:fullscreen` command (Which currently only macVim has).
See https://www.haiku-os.org/docs/userguide/en/keyboard-shortcuts.html
for motivation on key combination used, as well as terminology choice.
With vim being inconsistent (`:help intro` suggests <A> and <M>, while
<Alt> is used at a dozen other places) following Haiku nomenclature
seems most appropriate.
closes: #18235
Signed-off-by: rymdbar <rymdbar@x20.se>
Signed-off-by: Christian Brabandt <cb@256bit.org>
cd9d30486a
