Move the EmojiFilter below the LabelReferenceFilter

This filter is replacing UTF8 emoji with actual <img>, preventing
LabelReferenceFilter from detecting a label with emoji in it.

Signed-off-by: Rémy Coutable <remy@rymai.me>
52 jobs for 24729-move-emoji_filter-down in 161 minutes and 22 seconds (queued for 2 minutes and 29 seconds)