improve the media wiki integration

[sbodese]

the media wiki integration creates a second search field. Here we need a better integration. Also the font selection differs from the regular liferay setup

[DavidFichtmueller]

What do you mean by "second search field"? On http://www.gfbio.org/wiki there is only one (the one from the portal), and there is a different ticket to even hide this, since it implies that the Wiki is searchable: see #17 .