It is possible to override locked documents with version Restore

Scenario:

1. In EM for Experience Page create  version1 and version2 by user A.
2. Note that version 2 is the latest version and the document is locked by user A.
3. Login with user B and try to restore version 1 created by user A.

Expected result: user B should not be able to override locked documents with version restore.

Actual result: user B overrides a locked document with version 1.

Problem

As a matter of fact, it is possible to restore a version in all cases where the document is supposed to be non-editable:
locked, outstanding (de)publication request, scheduled (de)publication, when xpage is part of a project and is in review...
And this is true also for documents in the content perspective.

Solution

Restoring a version must not be allowed, when the document: 

• is locked
• has a request for (scheduled) publication or take offline that has not been accepted/reject yet
• is scheduled for publication or take offline
• is part of a project and is in review (project state is in review and document/page is not rejected)
• is part of a project that has status Approved

Changes needed for these cases:

• In CM: '+ Version' and 'Restore' button (for a selected previous version) must be hidden from the Versions tab in the xpage sidepanel
• In Content application: 'Restore' button hidden from the "Revision viewer"
• If implemented, in CM the 'Save as version' option on the Page menu must be disabled