Adds refresh function to fix issue with reloading color legend
Refresh sprites
Merge branch 'develop' of github.com:CartoDB/cartodb20 into develop

* 'develop' of github.com:CartoDB/cartodb20:
  [importer] Don't log lat/lon column detection if none found
  [importer] Drop the_geom_webmercator column if present, before georeferencing
  [importer] Drop the_geom_webmercator column if present in SHPs
  [importer] Do not sanitize or index columns when importing
  [importer] Remove original file from temporary directory after extracting
  [importer] Do not create a cartodb_id column when loading data
  [importer] Don't alter schema for tables generated by OSM imports
  [importer] Add 'geom' as a candidate name for geometry column
  Fix on gemfile
  use cartodb.js development version in all the environments except production