How do I restore missing scrollbar arrows?

Since upgrading to Fedora 24, my calc spreadsheets do not have the arrows at either end of the horizontal and vertical scrollbars. They were also missing in Fedora 23, but I found a hack on the web modifying the gtk-2.0/gtkrc file. My current LO version is I found a previous question on Ask LO: “How do I enable scrollbar arrows in LO under Linux”, but that question went unanswered. A comment to that question indicated that LO was in transition to gtk-3.0, and that may be the reason why no answers were provided. Version is apparently using gtk-3.0, but the only fix I could find on the web involved enabling the arrows via a .config/gtk-3.0/gtk.css file; this had no effect. I have tried changing the theme from Adwaita to other themes (which appear to have scrollbar arrows enabled) but this also has no effect.