patch 9.1.1248: compile error when building without FEAT_QUICKFIX

patch 9.1.1248: compile error when building without FEAT_QUICKFIX

Problem:  compile error when building without FEAT_QUICKFIX
Solution: adjust ifdefs in popupwin.c, add CheckFeature quickfix
          to a few tests (John Marriott, Hirohito Higashi)

closes: #16940
closes: #16962

Co-authored-by: Hirohito Higashi <h.east.727@gmail.com>
Co-authored-by: Zoltan Arpadffy <zoltan.arpadffy@gmail.com>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>