setValue(value) {
		if (dom.matches(this.node, 'select') || dom.matches(this.node, 'input'))
			this.node.value = value;
	}
Set the current value of the input widget.

@instance
@memberof LuCI.ui.AbstractElement
@param {string|string[]|null} value
The value to set the input element to. For simple inputs like text
fields or selects, the value should be a - possibly empty - string.
Complex widgets such as `DynamicList` instances may accept string array
or `null` values.