Return when no selected element to ungroup

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2837 eee81c28-f429-11dd-99c0-75d572ba1ddd
Allow override of jsPDF saveAs function (jsPDF work not complete however); apply fix for issue #1209 on push buttons; fix comment

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2839 eee81c28-f429-11dd-99c0-75d572ba1ddd
Apply patch by stuart.moore@spektrix.com to fix issue #1205

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2840 eee81c28-f429-11dd-99c0-75d572ba1ddd