[Orgmode] Tags with characters above ASCII breaks tag shortcuts

[Björn Lindström]

In one of my files (encoded with UTF-8), I have this line:

#+TAGS: ACADEMIA(a) LÄSNING(l) PROJEKT(p)

Now, when I use `C-c C-c' somewhere to add a tag, the menu will look
like this:

    Inherited:
    Current:

      [a] ACADEMIA    [l] LÄSNING(l)    [p] PROJEKT

If I press `l RET', the tag added is `:LÄSNING(l):', not `:LÄSNING:'.