Add comment task to idea detail page

[michael-james]

As a user, I want to comment on an idea as I'm looking at everything that's been submitted. As a researcher, I want to see how people add comments on an idea page in comparison to completing microtasks.

Needs info:

• [x] should submitting a comment have a different action # than activities?

Acceptance criteria:

• [x] add comment form to idea detail page
  • [x] heading
  • [x] textarea
  • [x] submit button
• [x] when a comment is added
  • [x] save it in the feedbacks table
  • [x] mark it with the corresponding idea_id and user_id
  • [x] assign it to the comment task, which is type 20
  • [x] create a new taskHist record with the userid, ideaid, taskid (same as above), action=1, and null for quesid, linkid, timeall, timetyping
• [x] update submission summary table to reflect comments
  • [x] exclude comment interactions from all action rates (submitting, skipping, exciting, bouncing, etc.)
  • [x] add "comments" column to the right of totals that exists on its own as the number of submitted comments