Custom content and a11y compliance

Added an Accessibility tab with the property 'Role'. For a11y compliance, the widget must have the role="alert". This makes screen readers announce the text inside the notification.
Added Display Type. Simple mode: uses the notification text attribute. Custom Content mode: adds an area below the widget to drop other widgets into. By @bsgriggs

Added option to stack notifications

Added option to stack notifications

Updated libraries

Updated libraries

Updated to mendix 10

Updated to mendix 10

Major update

*** BREAKING CHANGES ***
The setup of the widget has been changed to a datasource and multiple properties are changed to expressions.
Have a good look at the settings of the widget.

Upgraded widget and dependencies

Upgraded widget and dependencies, ready for mendix 9

Added on close and on show actions

Added on close and on show actions

First version

First version of the widget