Preserve poll options set via FoF Polls

[pflstr]

Similar to #1:

If a discussion with a poll is saved as a draft the poll part is not saved.

[askvortsov1]

For this to work:

• An extra attributes column will need to be added to the database
• Anything not in the defined fields (content/title/relationships) should be placed json-encoded into that extra attributes field
• Everything in that extra attributes field should be made a regular attribute when drafts are loaded into frontend, and when the scheduled command runs.

[askvortsov1]

Alternatively, title and content could also be moved into attributes, hence providing a unified, uniform system for saving and retreiving data. THis would probably be the most extensible option.

[dsevillamartin]

Don't do anything for now. I think it technically works, but I need to fix some things locally. Don't worry about it, leave it to me.

[askvortsov1]

It doesn't work, I verified it. Poll is stored as an attribute (poll name, relationship to options, etc), not as a relationship.

[askvortsov1]

Not doing anything now, but this might be worth straightening out before y'all tag the release

[dsevillamartin]

I meant that some of the code for it is there, but not handled correctly.