patch 8.1.1431: popup window listed as "Scratch"

Problem:    Popup window listed as "Scratch".
Solution:   List them as "Popup".

src/buffer.c

@@ -5781,6 +5781,10 @@ buf_spname(buf_T *buf)
 #ifdef FEAT_JOB_CHANNEL
 	if (bt_prompt(buf))
 	    return (char_u *)_("[Prompt]");
+#endif
+#ifdef FEAT_TEXT_PROP
+	if (bt_popup(buf))
+	    return (char_u *)_("[Popup]");
 #endif
 	return (char_u *)_("[Scratch]");
     }

src/popupwin.c

@@ -550,6 +550,7 @@ f_popup_hide(typval_T *argvars, typval_T *rettv UNUSED)
     if (wp != NULL && (wp->w_popup_flags & POPF_HIDDEN) == 0)
     {
 	wp->w_popup_flags |= POPF_HIDDEN;
+	--wp->w_buffer->b_nwindows;
 	redraw_all_later(NOT_VALID);
     }
 }
@@ -566,6 +567,7 @@ f_popup_show(typval_T *argvars, typval_T *rettv UNUSED)
     if (wp != NULL && (wp->w_popup_flags & POPF_HIDDEN) != 0)
     {
 	wp->w_popup_flags &= ~POPF_HIDDEN;
+	++wp->w_buffer->b_nwindows;
 	redraw_all_later(NOT_VALID);
     }
 }

src/testdir/test_popupwin.vim

@@ -196,12 +196,16 @@ func Test_popup_hide()
   let line = join(map(range(1, 5), 'screenstring(1, v:val)'), '')
   call assert_equal('world', line)
   call assert_equal(1, popup_getpos(winid).visible)
+  " buffer is still listed and active
+  call assert_match(winbufnr(winid) .. 'u a.*\[Popup\]', execute('ls u'))
 
   call popup_hide(winid)
   redraw
   let line = join(map(range(1, 5), 'screenstring(1, v:val)'), '')
   call assert_equal('hello', line)
   call assert_equal(0, popup_getpos(winid).visible)
+  " buffer is still listed but hidden
+  call assert_match(winbufnr(winid) .. 'u h.*\[Popup\]', execute('ls u'))
 
   call popup_show(winid)
   redraw

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1431,
 /**/
     1430,
 /**/