Cherrypick our new feature for displaying the Total Downloads of each item's bitstreams (sum of bitstreams download)
New feature Total Downloads:
FE commit -> f993a276e993c882398589967aac2026e4325c80
Make it configurable in dspace.cfg:
FE commit -> f60bfc82b5a2f8a0154508fe3542da3cceae395d
BE commit -> 7b5d636b41b6ef1bbaa9079393a36cb29bae676c