patch 8.1.1561: popup_setoptions() is not implemented yet

Problem:    Popup_setoptions() is not implemented yet.
Solution:   Implement popup_setoptions().  Also add more fields to
            popup_getoptions().
diff --git a/src/evalfunc.c b/src/evalfunc.c
index b98c7e7..66612e8 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -824,6 +824,7 @@
     {"popup_menu",	2, 2, f_popup_menu},
     {"popup_move",	2, 2, f_popup_move},
     {"popup_notification", 2, 2, f_popup_notification},
+    {"popup_setoptions", 2, 2, f_popup_setoptions},
     {"popup_settext",	2, 2, f_popup_settext},
     {"popup_show",	1, 1, f_popup_show},
 #endif