patch 8.2.2123: after using a complete popup the buffer is listed

Problem:    After using a complete popup the buffer is listed. (Boris
            Staletic)
Solution:   Make the buffer unlisted.

Author: brammool

src/popupmenu.c

@@ -858,6 +858,7 @@ pum_set_selected(int n, int repeat UNUSED)
 			// Edit a new, empty buffer. Set options for a "wipeout"
 			// buffer.
 			set_option_value((char_u *)"swf", 0L, NULL, OPT_LOCAL);
+			set_option_value((char_u *)"bl", 0L, NULL, OPT_LOCAL);
 			set_option_value((char_u *)"bt", 0L,
 					       (char_u *)"nofile", OPT_LOCAL);
 			set_option_value((char_u *)"bh", 0L,

src/testdir/test_popupwin.vim

@@ -3215,6 +3215,9 @@ func Get_popupmenu_lines()
       call setline(1, 'text text text text text text text ')
       func ChangeColor()
 	let id = popup_findinfo()
+	if buflisted(winbufnr(id))
+	  call setline(1, 'buffer is listed')
+	endif
 	eval id->popup_setoptions(#{highlight: 'InfoPopup'})
       endfunc
 

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2123,
 /**/
     2122,
 /**/