Move settings file for folder to backend

[geofranzi]

Currently, folder settings are hardcoded in a JSON Settings file in the UI project. To avoid the need to modify frontend code when adding new folders, this configuration should be moved to the backend.

• create a model to hold the needed information under "climate"
  • Name
  • ...
• remove the hard-coded code from the ui and add error handling if the backend is not accessible (# ??? )
• remove also the hardcoded list from the backend (?) - would be good to also have a "activated" / dactivates" flag

[geofranzi]

The new model is currently missing in the Django backend overview

[geofranzi]

• add activate/deactivate attribute
• replacement of the hard-coded list in https://github.com/geofranzi/geoportal/blob/master/framework/climate/temp_file_locations.py
• add description, activated/deactivated, status to Django overview table