Description of problem:
Update descriptions often contain URLs linking to upstream changelogs. Unfortunately, those are not clickable nor even copyable in plasma-pk-updates, one has to retype them by hand. This is a very poor user experience.

Version-Release number of selected component (if applicable):
plasma-pk-updates-0.2-9.20160307git7b484b0.fc24

How reproducible:
Always

Steps to Reproduce:
1. Click on the plasma-pk-updates plasmoid icon in the system tray.
2. Click on an update to bring up its description.
3. If there is no URL in it, try another one.

Actual results:
The URL is not clickable. It cannot even be selected and copied.

Expected results:
URLs are clickable.

Additional info:
Please note that this only affects the URLs inside the description. Updates can also have Bugzilla references, and those are clickable.