examples/demo: tray max icon size fixup
Seems 96px won't work here.
<!-- tray -->
<property name="plugin-6" type="string" value="systray">
<property name="show-frame" type="bool" value="false"/>
- <property name="size-max" type="uint" value="96"/>
+ <property name="size-max" type="uint" value="64"/>
</property>
<!-- window list -->
