Make the ellipsis of truncated texts more prominent

Also fixes popup texts which should have been updated in the parent commit
and the panel opening mechanism which did not work when the below-the-fold
description box was display:none-d.

Change-Id: I5fc37429a7dc7a8f1517fa42375cd140d7d11674
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/589