Update: Bug fix of Issue #208

@pstoellberger, This PR is related to PR #208.

Bugfix: https://github.com/OSBI/saiku-ui/pull/211#issuecomment-31937560

Bugfix: https://github.com/OSBI/saiku-ui/pull/211#issuecomment-37758025

Tested on versions:
* IE 11
* Firefox 28
* Chrome 33.0.1750.154
* Opera 20
* Safari 5.1.7