MessageML is a markup language used by the Symphony Agent API for representing messages, including formatting (bold, italic, numbered and unnumbered lists etc.) and entity data representing structured objects.
This PR is related to #285
In order to support new dialog element, button should support 'cancel' type. A new type was added to the supported ones. Button's name is set to required for it.
This PR is related to #285 In order to support new dialog element, button should support 'cancel' type. A new type was added to the supported ones. Button's name is set to required for it.