Merge branch 'fix_fm.reporteventsummary' into 'master'

#1785 removed item_frequencies method in fm.reporteventsummary

See merge request !6822

(cherry picked from commit 75a7e8bc)

cea879d5 removed item_frequencies method in fm.reporteventsummary
96851c87 Update views.py
63b3955c Update views.py
a75bc219 Update views.py
38e67e58 Update views.py