patch 8.1.1600: cannot specify highlighting for popup window scrollbar
Problem: Cannot specify highlighting for popup window scrollbar.
Solution: Add "scrollbarhighlight" and "thumbhighlight" options.
diff --git a/src/window.c b/src/window.c
index c6d4aa3..d40b060 100644
--- a/src/window.c
+++ b/src/window.c
@@ -4857,6 +4857,8 @@
free_callback(&wp->w_filter_cb);
for (i = 0; i < 4; ++i)
VIM_CLEAR(wp->w_border_highlight[i]);
+ vim_free(wp->w_scrollbar_highlight);
+ vim_free(wp->w_thumb_highlight);
vim_free(wp->w_popup_title);
list_unref(wp->w_popup_mask);
#endif