Add MENU CLEAR to clear the screen on menu exit.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Clear away the countdown message before actually running the final
boot.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Don't display the cursor on the graphical screen while doing a quiet
boot.  When doing a quiet boot we will probably show the graphical
screen for a fair bit of time; as a result, we really don't want a
completely bogus cursor blob on the bottom of the screen.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add a MENU RESOLUTION command to make it possible to set a nonstandard
resolution.  If the nonstandard resolution is unavailable, we revert
to the text mode screen.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Add (disabled) debugging hooks to the menu system.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

The empty check in the menu system used "cm", but before "cm" had
actually been initialized.  Move the "cm" initialization earlier so we
do the right thing here.

Reported-by: CKSoon <cksoon79@yahoo.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

The Ctrl-W (word erase) key was broken: it would think the command
line got longer, not shorter, resulting in havoc.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

Conflicts:
	com32/menu/menumain.c

Signed-off-by: H. Peter Anvin <hpa@zytor.com>

The command invoked when no keys were pressed for the specified time
(ONTIMEOUT) may be different from the menu item initially selected
when the menu is displayed (DEFAULT or MENU DEFAULT).  Unfortunately,
this did not work together with MENU HIDDEN (which is exactly the case
when having a separate ONTIMEOUT command makes the most sense).

Signed-off-by: Sergey Vlasov <vsu@altlinux.ru>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>