Questionnaire creation workflow overhaul

[ywarnecke]

The current workflow when creating a new questionnaire requires several jumps between different views of the application.

Most of the time, the workflow includes the same steps in the same order:

Create questionnaire -> Add questions -> Add conditions -> Repeat for more questionnaires -> Create Bundle -> Add bundle to clinic

To make it feel like a more coherent experience, this workflow could be optimized by offering options to automatically navigate to the next workflow step.

The details on how to do this efficiently need some more thought effort.

[winkt0]

I think a quick and easy solution is to just add save buttons at each corresponding edit form to advance to the next main workflow step, as it a) informs the user about the typical workflow and b) saves some extra clicks. I've implemented this here: #244.

A better solution would be to implement a wizard stepper (https://mdbootstrap.com/docs/standard/components/stepper/) that both clearly displays the current position in the workflow, and also gives the options to jump to other steps, or open optional steps (e.g. question -> bundle -> clinic, but also a dropdown on question that lets the user add conditions etc.). I'll look into this now.