[Schema Explorer- TextBlock]: Underline or chevron icon is not provided for the link 'Label' and 'Host app you are targeting'.

[carlos-zamora]

https://microsoft.visualstudio.com/OS/_workitems/edit/37786899

[carlos-zamora]

The main hyperlinks we need to apply underlined styling to includes...

• label in Important note about accessibility
• Host app you are targeting in Important note about accessibility
• https://aka.ms/ACTextFeatures in TextBlock's schema
• https://docs.microsoft.com/en-us/adaptive-cards/authoring-cards/input-validation in Action.Submit's schema
• https://docs.microsoft.com/en-us/adaptive-cards/authoring-cards/input-validation in Action.ShowCard's schema
• https://docs.microsoft.com/en-us/adaptive-cards/authoring-cards/input-validation in Action.ToggleVisibility's schema
• https://docs.microsoft.com/en-us/adaptive-cards/authoring-cards/universal-action-model in Action.Execute's schema
• https://github.com/microsoft/botframework-obi/blob/jeffders/adaptiveCards2/protocols/botframework-activity/botframework-cards.md#oauth-card in Authentication
• https://github.com/microsoft/botframework-obi/blob/jeffders/adaptiveCards2/protocols/botframework-activity/botframework-cards.md#TokenExchangeResource in TokenExchangeResource
• https://github.com/microsoft/botframework-obi/blob/jeffders/adaptiveCards2/protocols/botframework-activity/botframework-activity.md#card-action in AuthCardButton