[Fix Priority 5] LPS-41108

Hi Ray,

it's a fix of LPS-41108 Users cannot view the permissions of a Blogs entry that they created.

The problem is that EditPermissionAction checks preferences of the portlet being configured.

But EditPermissionAction don't use portletResource parameter to load portlet preferences or configure the portlet. It use the parameter to identify a portlet to be assigned permissions to.

So I don't load/create the preferences to avoid the need for the permission check. Actually, the preferences are not used in the code.

On top, I decided to use ConfigurationAction/RenderRequest with empty preferences object to be consistent with other parts.

Thanks.