Fixes the lack of background on the news item title when scrolling, which makes the content unreadable and defeats the idea of the sticky title (#450), by putting the colour back that was removed in e4da0957.
Particularly in Compact mode, having 40px line height on 16px text results in large spaces in the middle of expanded multi-line titles. This wastes space and looks odd.
The three extra lines of CSS keep the standard positioning the same, keep the click box size the same, but keep headers looking more like:
Some RSS feed item
with two lines
rather than:
Some RSS feed item
with two lines (or is it something different? It is just so far away!)
Currently, the title in compact mode is an inline tag, which means that if it starts wrapping to a new line then any white space isn't clickable to expand the article. These changes make it more easily clickable, don't interfere with the "open" and "favourite" buttons, make wrapped titles align more neatly, and prevent the "time ago" text being a dead spot.
