MDL-47146 grades: merge simple and full view in setup

AMOS BEGIN
 CPY [categoriesanditems,core_grades],[setup,core_grades]
AMOS END
MDL-47146 grades: remove advanced mode in setup
MDL-47146 grades: fix navigation bar in grades setup pages

Part of: MDL-46576
hide select column if no categories
action buttons
temp
imported Andrews contribution column