patch 8.1.1167: no test for closing tab by click in tabline

Problem:    No test for closing tab by click in tabline.
Solution:   Add a test.  Also fix that dragging window separator could fail in
            a large terminal. (Dominique Pelle, closes #4253)
diff --git a/src/version.c b/src/version.c
index cd7bb3f..a12bd09 100644
--- a/src/version.c
+++ b/src/version.c
@@ -772,6 +772,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1167,
+/**/
     1166,
 /**/
     1165,