Ability to create a data set and edit the attributes

[zdmullen]

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

I would like to be able to create a new data set and during the creation (allocation) process be able to edit the attributes as applicable.

Describe the solution you'd like

Describe alternatives you've considered

I know that you can go into the settings.json, copy the attributes of a given data set, paste them into the settings.json and change them, but this is not the most straightforward approach (nor is it formally documented).

Additional context

This is connected to what @katelynienaber has added in her draft PR #903 .