Misleading tooltip on dataset listings page

[matsbov]

On the datasets listing page (/datasets) there is a small arrow icon in front of each item in the list. The arrow appears clickable and shows the tooltip "Click to show more information". Nothing happens when you click it.

The code that's supposed to show more information is out commented and seems unfinished. This PR (#248) "fixes" this by removing the misleading tooltip and the clickable appearance of the icon.

You could of course instead fix the intended functionality but I don't know how much work that would involve. Either way something should be done because as it stands now it appears broken.

[adam-collins]

PR merged