Clicking on notation code in hierarchy loads wrong page

[osma]

At which URL did you encounter the problem?

http://finto.fi/ykl/en/page/1

What steps will reproduce the problem?

1. Open any concept in YKL/PLC (or any other vocabulary with notations), e.g. above URL
2. Click on the notation code of any concept in the hierarchy, e.g. "10" before GENERAL WORKS

What is the expected output? What do you see instead?

Expected that the concept whose notation was clicked would load. Instead the content area shows the front page of the vocabulary!

I think this happens because the notation is contained in a <span class="tree-notation"> element. The JS code expects that the <a> element is clicked, not a subelement like this.

In the current master branch the situation is even worse, since clicking on the label also causes the same problem. This happens because the label was also wrapped in a <span> element in PR #1205 .

What browser did you use? (eg. Firefox, Chrome, Safari, Internet explorer)

Firefox