Place the widget on the page, then select the object thaty ou want to apply responsive height to it.
Go to the Hyperlink panel at the top of the page and type RH in the Tooltip box, and the object will have proportional height.
To make an object have a height 50% of the height of the browser, type RH 50 in the tooltip panel, whichle the object is selected.
That is all you need to do, your object has responsive height.