Two minor UI tweaks

The first one is about opening a collapsed feed (or closing it). Previously clicking a little above or below the feed title would not open the feed since the `ng-click` was on the title text. This patch moves that `ng-click` to the container so now the feed can be opened by clicking anywhere on the line.

The second one is to add tooltips (`title` attribute) on the feed/story title. This is useful to see extra long title that gets cut due to limited width.