ComboBox style attributes

ComboBox style presentation attributes apply to a combobox element.

Table 1. ComboBox style attributes
Attribute	Description	GDC CLIENT	HTML5 CLIENT
`autoSelectionStart`	Defines the item from which the auto-selection will start, when pressing keys. Valid can be: `"current"` (default): the auto-selection looks for the first corresponding item after the current item of the object. `"first"`: the auto-selection looks for the first corresponding item after the first item of the object.	Yes	No
`comboboxCompleter`	Activate the ComboBox completer mode. Possible values are `"yes"` and `"no"` (default). When this attribute is set to yes, the ComboBox will have the following behavior: The ComboBox is editable, but only characters that match an item in the list are allowed (if the list contains the item `"aa"` and the item `"ab"`, you can type `"a"`, `"aa"`, `"ab"`, but nothing else. If you paste text in the field, it will be truncated until the rule is fulfilled. The drop-down list will only display item which starts with the same characters as the edit field. It is dynamically updated as you type (if the list contains the item `"aa"` and the item `"ab"` and you type `"a"`, you will see both item displayed, but if you continue to type another `"a"`, you will only see `"aa"` in the list. The best match is automatically selected when leaving the field (thus performing an `"on change"`) as soon as you hit `"TAB"` key, even if the input is not complete.	Yes	No
`completionTimeout`	Defines the timeout (in milliseconds) to build the character sequence for item lookup when the user presses several keys successively. When pressing multiple keys, a character sequence is build for item lookup. After the timeout delay has expired, the character sequence is reset.	Yes	No