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
Reveal the full title + author + source when the user clicks one
of these, and make some related changes:
* expand the above-the-fold part of the metadata panel so they fit
* make the stripe buttons smaller and hide their text
* scroll the panel up if necessary
* modify tooltip texts when there is more text to show
Change-Id: I304297bc5e7be7b16e2fc4bde66ac19641b00029
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/396
