Visual Themes in wiki

Hi,

I updated the https://cwiki.apache.org/confluence/display/OFBIZ/Visual+Themes+-+How+to page, notably for new releases but not only, please review.

I wonder if we should keep https://cwiki.apache.org/confluence/display/OFBIZ/Visual+Themes+Gallery which is completly out dated and seems nobody care
about creating and updating themes :/

Jacques