Idea for these labels is to give instructions which labels to copy
on step and on workflow when function step is added to the graph.

Labels are defined with "step,workflow", "workflow" or "step" for value.
UI should follow these instructions when copying labels to workflow
and/or step.

Some CSV files failed to detect as text/csv so the import failed.
ref: https://github.com/gabriel-vasile/mimetype/issues/138

Fixes issue cortezaproject/corteza-webapp-compose#213

Some CSV files failed to detect as text/csv so the import failed.
ref: https://github.com/gabriel-vasile/mimetype/issues/138