behavior change: date picker, stringResult

Webix JS
1

up to 2.1.8 date picker gave as stringResult date in format Y-m-d independent of format: property.

now date picker gives stringResult in same format like defined by property format.

would be nice for compatibility reasons to have 2 properties, control format and string result format.

2

Behavior will be normalized in the next update
setValue and getValue will use parseFormat from webix.i18n
config.format will be used only to define format of visible text