StudentFeedbackResultsPage: separate self-responses from others' responses

[craaaa]

Description of feature/enhancement
Visually separate the responses given to a student by others and the student's own submissions when displaying feedback results.

Justification
When students view feedback results, the student's own responses are merged with others' responses to the student under the same question heading, as shown below.

However, in some cases there is little distinction between responses a student gave and responses the student receives, making reading the results page confusing. For instance, in the example below, the student's received responses are placed in between responses that the student gave to others.

While we can keep the student's responses on the results page (to help students remember what they wrote themselves), we can make the viewing experience less confusing by either:
a) Making responses to others an entirely different section of the results page (i.e. first display all responses from others, then display all responses to others)
b) Splitting each question into sections (responses from others first, followed by responses to others)

Existing similar features and their shortcomings
At the moment we use light/dark blue headings to split responses to/from the viewer. However, what light/dark blue corresponds to isn't very clear (possibly a separate issue?), and the linear organization of the results page doesn't clearly demarcate the switch between new information (what others are saying about you) and old information (what you said about others).

[damithc]

Other things we can do (along the same lines):

• Use grey instead of light blue
• mark them clearly as 'Your own response'
• not show own responses at all

[davel37]

Working on this. Looking at implementing some of the suggestions here to make the difference between the two more apparent.

[davel37]

So this is how it currently looks after implementing 2 of @damithc suggestions:

[craaaa]

Looking good @davel37! Do open a PR when you are ready.