patch 9.1.1391: Vim does not have a vertical tabpanel

Problem:  Vim does not have a tabpanel
Solution: include the tabpanel feature
          (Naruhiko Nishino, thinca)

closes: #17263

Co-authored-by: thinca <thinca@gmail.com>
Signed-off-by: Naruhiko Nishino <naru123456789@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/Filelist b/Filelist
index 85e4d32..df10c6d 100644
--- a/Filelist
+++ b/Filelist
@@ -151,6 +151,7 @@
 		src/strings.c \
 		src/structs.h \
 		src/syntax.c \
+		src/tabpanel.c \
 		src/tag.c \
 		src/term.c \
 		src/terminal.c \
@@ -335,6 +336,7 @@
 		src/proto/spellsuggest.pro \
 		src/proto/strings.pro \
 		src/proto/syntax.pro \
+		src/proto/tabpanel.pro \
 		src/proto/tag.pro \
 		src/proto/term.pro \
 		src/proto/terminal.pro \