used default step values for SpinButtons

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2404 eee81c28-f429-11dd-99c0-75d572ba1ddd
cleaned up grid extension

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2405 eee81c28-f429-11dd-99c0-75d572ba1ddd
fixed formatting in closepath extension

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2406 eee81c28-f429-11dd-99c0-75d572ba1ddd
fixed formatting in panning extension

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2407 eee81c28-f429-11dd-99c0-75d572ba1ddd