Ideas for workflow adding (and templates)

[jluethi]

Currently, users can either create an empty workflow or import a workflow from disk.

In the future, these additional options would be nice:

1. Add a workflow from a list of default workflows (=> import from the server, some list of suggested workflows)
2. Add a workflow from another project (can be done via export from project, import to new project => not urgent to implement once we have export functionality of workflows in the interface as well)

If we support those features as well, we may want to slightly redesign the add-workflow flow:
When a user clicks Add-Workflow, a modal shows up and presents those choices to the user:
a) Create an empty workflow with a given name
b) Import a workflow form disk & give it a name
c) Create a workflow from a core template & give it a name
d) Create a workflow based on another workflow the user had in one of their existing projects

This is not part of the 0.2 scope, just future planning for workflow creation :)