Update bootstrap to 3.1.1

git-svn-id: https://svn.apache.org/repos/asf/jena/branches/jena-fuseki-new-ui@1573009 13f79535-47bb-0310-9956-ffa450edef68
Fix some buttons, break others

git-svn-id: https://svn.apache.org/repos/asf/jena/branches/jena-fuseki-new-ui@1573011 13f79535-47bb-0310-9956-ffa450edef68