fixed some bi-directionality issues

Fixed some issues which occur whenever RTL and LTR languages could
potentially be mixed, using the HTML5 `<bdi>` element.
This element is currently only supported by Chrome and Firefox.

The old and only partially working fix for tpl_breadcrumbs() was removed in
favour of this solution.
Merge pull request #252 from splitbrain/bi-directionality

fixed some bi-directionality issues