Sources Integration with FE and vector tiles and db

[zoobot]

• Users will be able to view and Add new sources from front end
  [New Feature Implementation] Implement new design of "Tree Sources / Data" page plus specific sources wtt_front#282
  Zoobot/feature/data sources wtt_front#401

• API work to add new sources from front end to the sources table in the DB
  Change id to id_name in sources/crosswalk, Change ref to id_reference… wtt_db#50
  Zoobot/feature/data sources wtt_server#126

• Update Cities and Countries when new source added
  Add city and country to cities/countries when source is added via front end wtt_server#137

• Create an organization table in db and update organization and user when new source added

• All current trees will be saved in the sources table in the DB
  Merge trees to database wtt_db#48
  merge-trees-to-database tree-sources#15

• Css fixes for FE sources
  Sources page - css massage - sticky header, label normalization, change button styling to the component buttons wtt_front#580