camelCased default_img_url -> defaultImageURL

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2445 eee81c28-f429-11dd-99c0-75d572ba1ddd
misc if simplification

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2446 eee81c28-f429-11dd-99c0-75d572ba1ddd
simplified label disabled

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2447 eee81c28-f429-11dd-99c0-75d572ba1ddd
unified sidePanel resizing / toggling

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2448 eee81c28-f429-11dd-99c0-75d572ba1ddd