Fix #4149, fix #1199 - Store emojis as unicode (#4189)

- Use unicode when selecting emoji through picker
- Convert shortcodes to unicode when storing text input server-side
- Do not convert shortcodes in JS anymore

spec/helpers/emoji_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+RSpec.describe EmojiHelper, type: :helper do
+  describe '#emojify' do
+    it 'converts shortcodes to unicode' do
+      text = ':book: Book'
+      expect(emojify(text)).to eq '📖 Book'
+    end
+
+    it 'does not convert shortcodes that are part of a string into unicode' do
+      text = ':see_no_evil::hear_no_evil::speak_no_evil:'
+      expect(emojify(text)).to eq text
+    end
+  end
+end