Tests for cklist runs

[romanc]

There are a couple of tests auto-generated from authentication system and the checklist resource. The scope of this issue is to cover cklist runs, which aren't covered at all yet.

Adding tests before shipping the MVP will make a nicer developer experience when adding all the planned enhancements. Things to check could include the following:

For non-sequential cklists

• checking checkboxes updates the progress bar
• cklist is completed after all checkboxes are checked
• checkboxes are disabled after checklist is completed
• abort button aborts the current run

For sequential cklists

• While looking at one step, the next step shows "small & below" (unless there's none)
• completing a step updates the progress bar
• cklist is completed after the last step is done
• abort button aborts the current run

Completing issue #12 will more things to test.