`GtkRange` with `Adjustment:page-size` <> 0 causes highlight to be drawn to wrong position / behind slider value

I know :page-size is probably not hugely relevant for GtkScale, but it does introduce a drawing difference between GTK3 and GTK4, in case that indicates something larger needing fixed - which I guess it does, since the snapshot code drawing the highlight lives in GtkRange.

If a Scale has page-size set, that causes the usable/slider range to be decreased towards the max, by the page-size. Strange, but OK!

In GTK4 though, this also causes the highlight that gets drawn to lag behind the slider handle by an amount proportional to the value (not constant).

GTK3:

GTK4:

I guess this should work the same in both versions, even if it is a bit weird/pointless for GtkScale; it might be relevant for other GtkRange subclasses.

Test UI file:

<interface>
	<object class="GtkAdjustment" id="adjustment">
		<property name="lower">0</property>
		<property name="upper">100</property>
		<property name="step-increment">1</property>
		<property name="page-increment">19</property>
		<property name="page-size">25</property>
		<property name="value">50</property>
	</object>

	<object class="GtkWindow">
		<child>
			<object class="GtkScale">
				<property name="visible">true</property>
				<property name="draw-value">true</property>
				<property name="value-pos">right</property>
				<property name="adjustment">adjustment</property>
			</object>
		</child>
	</object>
</interface>