AO3-5596 Make boxes on All Fandoms page clear properly #4876

Job	Run time
rake db:otwseed	1m 6s
rspec spec/controllers	13m 40s
rspec spec/models	5m 26s
rspec --exclude-pattern 'spec/{controllers,models}/*/.rb'	8m 55s
cucumber features/admins	6m 48s
cucumber features/bookmarks	6m 15s
cucumber features/collections	6m 13s
cucumber features/comments_and_kudos	7m 30s
cucumber features/gift_exchanges	7m 58s
cucumber features/importing	2m 46s
cucumber features/other_a	11m 20s
cucumber features/other_b	7m 22s
cucumber features/prompt_memes_a	4m 9s
cucumber features/prompt_memes_b	3m 52s
cucumber features/prompt_memes_c	5m 5s
cucumber features/search	6m 40s
cucumber features/tag_sets	3m 17s
cucumber features/tags_and_wrangling	6m 48s
cucumber features/users	5m 11s
cucumber features/works	13m 47s
	2h 14m 8s

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