[Request]: Allow csv fields to be combined

[steveoh]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe.

My CSV has the street address split up into multiple columns and I have to merge them before I can use the app.

Describe the solution you'd like

It would be nice to be able to have a UI that allows me to choose fields and arrange them so that their combination can be used as the input for geocoding.