0.0.3

• add isOn API for checking if dialog is active or not
• handle key event only if dialog is on
• separate toggling code into standalone toggle api
• show local timezone offset in host
• update ui also when hour / minute change
• fix bug: hour / minute don't work
• support enter / escape to close
• let dialog be mutual exclusive
• fix bug: incorrect position when scrolling if scroll element is outside the absolute / relative positioned element.