Fix Bug #28344 - “Links doesn't work inside collapsible toggles”

Fix Bug #28344 - “Links doesn't work inside collapsible toggles”
Patch from mybugs.mail

    If a link is added inside of a collapsible toggle and a user click on it, the
    target page should be opened.
    …
    The attached patch was tested locally and fixes this bug (clicking outside the
    link toogles the collapsed content, and clicking on the link opens the target
    page).

    PS: It is the same code which was used to fix the problem on Commons.

    http://commons.wikimedia.org/w/index.php?diff=45383826&oldid=45265712