SVGHMI: widgets are not anymore binary relative or absolute, but have a "relativeness".
Because of allowing multiple variables per widget, we must distinguish if individual variables is relative to page, not the whole widget.
// 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»",
}
| },
}