MDL-43089 Develop paging. Mid first draft

join pages mid first draft
improved repaginate class
call repaginate using newer approach
looping through activities. Found pages
display one add menu per page
display repaginate popup when at least 2 questions
adding css for Edit marked out of
edit max grade form display inline and reduce width
add menu moved inside page li element
added slot actions divs for drag and drop spinner
add repaginate page