i124384 - [API] Add since tag to Undo API IDL files

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1575660 13f79535-47bb-0310-9956-ffa450edef68
i124385 - [API] Unpublish the Undo API

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1575661 13f79535-47bb-0310-9956-ffa450edef68
Remove useless comments

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1575662 13f79535-47bb-0310-9956-ffa450edef68
Do not display heading in the IDL short description

git-svn-id: https://svn.apache.org/repos/asf/openoffice/trunk@1575663 13f79535-47bb-0310-9956-ffa450edef68