SVGHMI: provide request_animate() to Widget authors so that they can register redraw code when events lead to redraw. Widget member animate() is called when it is time to update DOM.
// widget_list.ysl2
template "widget[@type='List']", mode="widget_defs" {
param "hmi_element";
| items: {
foreach "$hmi_element/*[@inkscape:label]" {
| «func:escape_quotes(@inkscape:label)»: "«@id»",
}
| },
}