Organization new filters

[joanagmaia]

Changes proposed ✍️

• Create # employees and # members filter fields
• Add both fields to Organization model with filterable option set to true
• Add defaultOperator prop to Filter type number so that it does not show the operator selector if the defaultOperator is set to between.
• Refactor between logic in build-api-payload:
  • Prevent empty values to be sent as null
  • When both bottom and top limit are set, use the between operator
  • When only bottom limit is set, use the gte operator
  • When only top limit is set, use the lte operator

Screenshots (front-end changes only)

Checklist ✅

• Label appropriately with type:feature 🚀, type:enhancement ✨, type:bug 🐞, or type:documentation 📜.
• Tests are passing.
• New backend functionality has been unit-tested.
• Environment variables have been updated
  • Front-end: frontend/.env.dist
  • Backend: backend/.env.dist, backend/.env.dist.staging, backend/.env.dist.staging.
  • Configuration docs have been updated.
  • Team members only: update environment variables in Password manager and update the team
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.
• All changes have been tested in a staging site.
• All changes are working locally running crowd.dev's Docker local environment.

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[mariobalca]

Looks great! 👏
Thanks for refactoring the between operator, in the build-api-payload.js
Feel free to merge 💪