Photo moderation improvements

[VirginiaDooley]

Photo moderation - please can <@U01HUAQV6NA> look at the current queue to see how a Widen canvas feature would be useful, even if that work can't yet be prioritised?

Slack Message

Two additional points for info / completeness:
Grouping new buttons with the existing Rotate canvas feature then moving this rarely used section (including the justification link) down below the (always used) Your decision section would reduce scrolling and RSI.
There'd also be some value in a complimentary Add height feature, even though this'd be used much less often. Here's a recent example that'd benefit from more height: https://candidates.democracyclub.org.uk/moderation/photo/review/40094
But here's one that wouldn't: https://candidates.democracyclub.org.uk/moderation/photo/review/40410
By comparison, we regularly get ones that need additional width - adding transparent sides would enable all of these to be cropped to a better square headshot:
https://candidates.democracyclub.org.uk/moderation/photo/review/39645
https://candidates.democracyclub.org.uk/moderation/photo/review/39646
https://candidates.democracyclub.org.uk/moderation/photo/review/39647
https://candidates.democracyclub.org.uk/moderation/photo/review/39752
https://candidates.democracyclub.org.uk/moderation/photo/review/39916
https://candidates.democracyclub.org.uk/moderation/photo/review/39955
https://candidates.democracyclub.org.uk/moderation/photo/review/40084
https://candidates.democracyclub.org.uk/moderation/photo/review/40090
https://candidates.democracyclub.org.uk/moderation/photo/review/40310
https://candidates.democracyclub.org.uk/moderation/photo/review/40313
https://candidates.democracyclub.org.uk/moderation/photo/review/40313
https://candidates.democracyclub.org.uk/moderation/photo/review/40377
https://candidates.democracyclub.org.uk/moderation/photo/review/40384
https://candidates.democracyclub.org.uk/moderation/photo/review/40413
https://candidates.democracyclub.org.uk/moderation/photo/review/40482 to:
https://candidates.democracyclub.org.uk/moderation/photo/review/40496