Issue #2000928 by DYdave: Fix minor coding standards issue introduced in previous revision at 64f81beb.

Issue #2000814 by DYdave: Added feature to allow users to select the state of the collapsible markup to insert: collapse or collapsed.

Issue #1890908 by DYdave: Quick fix of coding standards, mostly wrong indents or end of line white spaces.

zhou xiukun authored May 22, 2013 and David Suissa committed May 22, 2013

Issue #1986878 by proweb.ua, xiukun.zhou: Fixed JS compatibility issue with latest versions of CKEditor 3.6+ and 4.x+.