Improvements

• Dialog handler is now keyboard accessible.
• Dropdown component is now keyboard accessible.
• Device Display: focusing into component now can be disabled with the focus-disabled attribute.

Fixes

• Dialog handler: fixed issue of dialog could be opened even when it was disabled.
• Datagrid: fixed issues in priority mode.
• Layout: fixed issue of unnecessary horizontal scrollbar appearing.
• Vertical Tabs: fixed issue of tab label overflow.
• Popup utility: fixed issue of panel opening only vertically even when there's no vertical space available.