patch 8.1.2365: missing tests for recent popupwin changes

Problem:    Missing tests for recent popupwin changes.
Solution:   Add test cases.
diff --git a/src/version.c b/src/version.c
index 7bc97da..d4e0861 100644
--- a/src/version.c
+++ b/src/version.c
@@ -738,6 +738,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2365,
+/**/
     2364,
 /**/
     2363,