Add page chunk button (was missing in action)
CKEditor base z-index

Fixes any issues with #2221
Use models instead of $this->db

Takes care of issue #2225
and use models when appropriet
This was inefficient

realized `page_type_m->get` also might try to real files, when they are not needed.
Merge pull request #2185 from ryun/patch-21

Add page chunk button (was missing in action)
Merge pull request #2226 from ryun/patch-26

Fixes Issue #2225 & Use models instead of $this->db
Merge pull request #2222 from ryun/patch-25

CKEditor base z-index