#30 - Fix: Prevent allowing one to select "relative to course module completion" if there is no course module with completion enabled

[danowar2k]

Fixes #30

[ewallah]

I fixed the code during a boring meeting after I only have seen your submitted issue. I did not have a clue you prepared a pull request.

I find my code is slightly better:

• no code coverage loss
• added Behat test to check if the changes actually work
• reduced npath complexity yours vs mine
• no excessively long variable names warning

So sorry I have to close the issue without merging>

[danowar2k]

No worries, I suspected something like this :-D