"Favorite" indication not visible in the Ranking Round

[CiellB]

Favorite images are not indicate as such in the Ranking Round (which is where the indication is very useful to the juror!).
I can't see it in the gallery mode, nor when I pop-up the title in the bottom of an image in gallery mode, nor when I click to enlarge the image within Montage.

Steps to reproduce:

• In an active Montage campaign, favor a few images.
• Open the the Ranking Round.
• Search for your favorite images to make your ranking round easier.

[ItsAbhinavM]

I see no reason why favorite button is not there for ranking rounds, its also not mentioned in VoteRanking.vue file, I think it's just a simple fix. Will give a PR to fix this issue.