This fixes "Set field in (at least) widget screen does not take into account a locale for (at least) the Float type" https://issues.apache.org/jira/browse/OFBIZ-5453

It actually does more than that. It follows Adrian's proposition of improving the GeoPoint data model. 
I did not applies all of Adrian's proposition (see our conversation in the Jira issue). Feel free to apply it completely if you are inclined so. 

I will also add an entry in wiki page "Revisions Requiring Data Migration (upgrade ofbiz)" at https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=7045166

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1557447 13f79535-47bb-0310-9956-ffa450edef68