patch 8.1.1880: cannot show extra info for completion in a popup window

Problem:    Cannot show extra info for completion in a popup window.
Solution:   Add the "popup" entry in 'completeopt'.
diff --git a/src/proto/ex_cmds.pro b/src/proto/ex_cmds.pro
index c31fee3..a0203e7 100644
--- a/src/proto/ex_cmds.pro
+++ b/src/proto/ex_cmds.pro
@@ -37,7 +37,7 @@
 char_u *get_old_sub(void);
 void set_old_sub(char_u *val);
 void free_old_sub(void);
-int prepare_tagpreview(int undo_sync);
+int prepare_tagpreview(int undo_sync, int use_previewpopup, int use_popup);
 void ex_help(exarg_T *eap);
 void ex_helpclose(exarg_T *eap);
 char_u *check_help_lang(char_u *arg);
diff --git a/src/proto/popupwin.pro b/src/proto/popupwin.pro
index f1d0d2b..f2cbf07 100644
--- a/src/proto/popupwin.pro
+++ b/src/proto/popupwin.pro
@@ -8,9 +8,11 @@
 void popup_handle_scrollbar_click(win_T *wp, int row, int col);
 int popup_height(win_T *wp);
 int popup_width(win_T *wp);
+int popup_extra_width(win_T *wp);
 void popup_adjust_position(win_T *wp);
 int parse_previewpopup(win_T *wp);
-void popup_set_wantpos(win_T *wp, int width);
+void popup_set_wantpos_cursor(win_T *wp, int width);
+void popup_set_wantpos_rowcol(win_T *wp, int row, int col);
 void f_popup_clear(typval_T *argvars, typval_T *rettv);
 void f_popup_create(typval_T *argvars, typval_T *rettv);
 void f_popup_atcursor(typval_T *argvars, typval_T *rettv);
@@ -44,10 +46,11 @@
 void update_popups(void (*win_update)(win_T *wp));
 int set_ref_in_popups(int copyID);
 win_T *popup_find_preview_window(void);
-void f_popup_getpreview(typval_T *argvars, typval_T *rettv);
 int popup_is_popup(win_T *wp);
-int popup_create_preview_window(void);
-void popup_close_preview(void);
+win_T *popup_find_info_window(void);
+void f_popup_getpreview(typval_T *argvars, typval_T *rettv);
+int popup_create_preview_window(int info);
+void popup_close_preview(int info);
 void popup_set_title(win_T *wp);
 void popup_update_preview_title(void);
 /* vim: set ft=c : */