Shows just 3 tags per visualization. Fixes long titles in vis
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  fixes problems sorting layers - fixes vizzuality/cartodb-management#2665
  Prefetch tables and inject current_user and tables to render GET /api/v1/viz
  Store full member instances in-memory in Visualization::Collection to avoid querying the DB for each member
  Optionally inject a user and/or table to Visualization::Presenter
  Optionally inject a user to Visualization::Member#stats
  Optionally inject user to Table#rows_estimated and Table#table_size
  Optionally inject a user to Visualization::Stats
  patched vizzuality/cartodb-management#2664
Allows to add the same table