Add capability for other question behaviours

[spreissolms]

I've run into an issue where after having a custom question behaviour installed, quiz attempts are showing up in the grade me block, but they disappear after the reset tables task has run. I believe it's because it's looking for and keeping only those that are of the manualgraded type, but nothing else.

My suggestion is to add a configuration on either the plugin, or change it's code so that it also includes question behaviours of other types.

Let me know if more information is required.