viewer: upgrade to Angular 1.2.6

And also put the unminified versions to help debugging performance
problems.
viewer: add tooltips to display test description

This is currently quite slow because it seems that AngularUI is building
the HTML for those tooltip in advance as fragments. They should be built
later.
viewer: display a tooltip for each test
viewer: make the modal detail dialog work with tooltips

By moving the tooltip into an inside element, we ensure that we don't
disable the click event that was on the parent. Moreover, we don't have
to retrigger the `mouseover` event.