Custom emoji in poll display once submitted

Before submitting

After submitting

• backend version: 2.2.0-8-g15550f7c
• frontend version: 8e87e3d8

mentioned in merge request !1307 (merged)

changed title from Emoji in poll display once submitted to Custom emoji in poll display once submitted

closed with merge request !1307 (merged)

mentioned in commit 5077549c