TNL-930: Turn off Student Notes when Harvard Annotation Tool is enabled.

Disables Student Notes if one of `textannotation`, `imageannotation`, `videoannotation` modules exist in the list of `Advanced Modules`.

There is still possibility to break `Student Notes` and `Harvard Annotation Tool`:
  - add one of `textannotation`, `imageannotation`, `videoannotation` to the `Advanced Modules` list;
  - add one of `textannotation`, `imageannotation`, `videoannotation` to the unit;
  - remove it form the `Advanced Modules` list => **You can enable Student Notes now. If you have both modules in the sequential, it breaks one of these modules.**

I think we should write a good note about this situation.

@tymofij , @olmar, @jmclaus, @srpearce  please review.

**sandbox:** http://studio.polesye.m.sandbox.edx.org/
> I do not know if it will work independently if none of 'textannotation', 'imageannotation', 'video annotation' are present. But perhaps we should also add it to the fields?

Looks like they are independent modules. I do not see any reasons to add  `notes` in this list. Enabling `My Notes` page shouldn't affect our Student Notes.