patch 8.0.0390: when the window scrolls the popup menu may be garbled

Problem:    When the window scrolls horizontally when the popup menu is
            displayed part of it may not be cleared. (Neovim issue #6184)
Solution:   Remove the menu when the windows scrolled. (closes #1524)
diff --git a/src/version.c b/src/version.c
index cff9e26..63eda8b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    390,
+/**/
     389,
 /**/
     388,