Indicator on suggested actions to show that the action will open a URL

[Edit by @corinagum]
Although the original comment is using Adaptive Cards as a visual example, this need applies to BotBuilder's suggested actions as well, which would be an update inside of the Web Chat repo. The Adaptive Cards example needs to be requested with Adaptive Cards.

Suggested action example:

Related to #3817

Note: Does the role for this button need to be updated to role=link? (a11y requirements)

(original message below):

For the suggested actions for adaptive cards, I would like to indicate what type of action would be taken by clicking the button. For example for "Action.CardType", I would like to indicate on the button that this will take you to an external URL:

At the moment this is no possible as every button is rendered with the same CSS so there is no way to differentiate which type of button has been rendered.

Is it possible to include the action type as part of the CSS on the rendered button as shown below?

Start by tracing how BotBuilder suggested actions are rendered in the Web Chat repo and where their button CSS is defined. Check the related issue #3817 and the accessibility question about whether URL actions should use role=link. Done means URL-opening actions are visibly distinguishable from other suggested actions without changing the separate Adaptive Cards request.