Removes PE type controller and views
Use type in API
Do not include module name
Rename instance variable
Use Type
Lets default and enabled PE type use Type
Remove PE type admin menu entry
Changes usage from PE type to type property
Fixes cukes
Merge branch 'feature/merge_planning_element_type_with_type' of github.com:opf/openproject into feature/merge_planning_element_type_with_type