Fix data availability with survey-consent

Fixes #1317

This PR flags any responses that use the survey-consent frame on the consent manager page. Specifically:

Adds a new boolean field called survey_consent to the Response model. The default value is false and it is set to true by the survey-consent frame in EFP (https://github.com/lookit/ember-lookit-frameplayer/pull/354).
Marks responses in the list on the left with [Survey consent] (similar to how preview responses are marked)
Adds some yellow warning text in the 'video information' area explaining that the response contains survey-consent, and some guidance for how the researcher should handle the consent verification. (Note that the survey-consent information is independent from the 'no video found' warning because responses with survey-consent may or may not also include consent/assent video).

I made a few other UI changes while working on the consent manager page:

Put all the elements in the video section (middle column) in a card with a 'video' heading, to match the other columns
Add a 'comments' label for the comments section (middle column, below the video area)
Highlight the entire 'video information' box above the video, rather than just the text, when there is a warning
In the response list on the left, remove the 'N/A' when there are no comments
Add a hover style (slight background color change) to the responses in the list on the left, to make it clearer that they are clickable elements

Screenshots:

Initial page with no response selected:

consent-no-selection