[GNC] configuring scroll bars

[mcmurchy1917techy]

Hi everyone

My system is

    Slackware Current
    KDE5 Plasma

with

    gtk+3    3.24.14
    linux    5.4.25
    gnucash  3.8

I have a config file .config/gtk-3.0/gtk.css which contains the folllowing

> @import 'colors.css';
>
> scrollbar {
>   -GtkScrollbar-has-backward-stepper: true;
>   -GtkScrollbar-has-forward-stepper: true;
> }
>
> scrollbar, scrollbar button, scrollbar slider {
>    min-width: 24px;
>    min-height: 36px;

This gives me a wide vertical scroll bar with a block at each end where 
the up and down arrows for the scrollbar are supposed to go, under 
normal operation the blocks are blank/empty they don't contain the 
up/down arrows.

If I click the blocks at each end of the scroll bar they behave as 
scrolling up and down as would be expected.

If I open up a dialog like File->Properties the character < appears in 
the top block and the character > appears in the bottom block of the 
vertical scroll bar. When the dialog is closed these characters disappear.

So two questions

 1. How do I get the correct characters to appear at each end of the
    scrollbar i.e. the upward pointing arrow and the downward pointing
    arrow?
 2. How do I get these characters to display under normal operation i.e.
    other then when displaying a dialog box?

Thanks