Cleaning up the lxdialog Makefile by factoring out the
ncurses compatibility checks.
This made the checks much more obvious and easier to extend.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

Remove support for lxdialog --checklist

The checklist lxdialog functionality is not used by menuconfig
(only the radiolist variant is used) and supporting it would
significantly complicate the forthcoming liblxdialog API.
Signed-off-by: NPetr Baudis <pasky@suse.cz>
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>

The only lxdialog user i kconfig - for menuconfig.
So move it to reflect this.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>