fixed missing fallback png align buttons, cleaned quotes, if style inconsistencies

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2399 eee81c28-f429-11dd-99c0-75d572ba1ddd
renamed some snake_case

git-svn-id: http://svg-edit.googlecode.com/svn/trunk@2400 eee81c28-f429-11dd-99c0-75d572ba1ddd