show all emojis in the /causes page

See #34, release log:

• 498f504 by @yegor256: #34 size
• 800b110 by @yegor256: #34 show emojis
• c87f72b by @yegor256: #30 css
• 8671bea by @yegor256: #30 typo

Released by Rultor 1.68.4, see build log