Unlisted emoji name in emoji picker's recently used list crashes room UI

[tassoevan]

Description:

Before EmojiOne update, there was an emoji named :hot_dog:, now renamed as :hotdog:. Since it was in the recently used emoji list on emoji picker, the entire room template failed to render.

Steps to reproduce:

1. Edit localStorage's entry emoji.recent to include an unlisted emoji name.
2. Open a run with an enabled message box containing the emoji picker.

Expected behavior:

The room opens without errors; the invalid emoji is not listed in picker.

Actual behavior:

The whole room template fails to render.

Server Setup Information:

• Version of Rocket.Chat Server: 1.1.0-develop (7ad3f25)
• Operating System: Ubuntu 18.04.2
• Deployment Method: from source code
• Number of Running Instances: 1
• DB Replicaset Oplog: Enabled
• NodeJS Version: 8.11.4 - x64
• MongoDB Version: 4.0.2

Relevant logs:

TypeError: Cannot read property 'emojiPackage' of undefined
    at Object.renderPicker (http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88541:58)
    at http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88176:52
    at Array.map (<anonymous>)
    at http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88174:52
    at Array.map (<anonymous>)
    at createEmojiList (http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88169:46)
    at http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88189:72
    at Array.forEach (<anonymous>)
    at createPickerEmojis (http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88189:14)
    at Blaze.TemplateInstance.<anonymous> (http://localhost:3000/app/app.js?hash=dd8ce6fd29508ea122276b8b62d4c23814560481:88427:3) undefined