Port GtkScale marks
Blueprint fails to port
<object class="GtkScale" id="scale">
<property
name="adjustment"
>adjustment</property>
<property name="round-digits">0</property>
<!-- <property name="draw-value">true</property> -->
<property name="digits">0</property>
<marks>
<mark value="0" position="bottom">0</mark>
<mark value="1" position="bottom">1</mark>
<mark value="2" position="bottom">2</mark>
<mark value="3" position="bottom">3</mark>
<mark value="4" position="bottom">4</mark>
<mark value="5" position="bottom">5</mark>
<mark value="6" position="bottom">6</mark>
<mark value="7" position="bottom">7</mark>
<mark value="8" position="bottom">8</mark>
<mark value="9" position="bottom">9</mark>
</marks>
</object>
with
error: unsupported XML tag: <marks>
in ./src/window.ui
The gtk-blueprint-tool compiler might support this feature, but the
porting tool does not. You probably need to port this file manually.