Fix emoji ordering

[marekvospel]

Description

When using emojis in cinny I noticed the order of emojis and stickers being the same as the order I uploaded them. Later when inviting my friends to the room, they showed me, that their order of emojis is different. (across homeservers)

This PR aims to fix this by ordering the emotes alphabetically (which feels like the most logical way to order them) both in emoji picker and inside autocomplete.

Fixes #1632

Type of change

• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [X] My changes generate no new warnings

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[marekvospel]

I have read the CLA Document and I hereby sign the CLA

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[marekvospel]

Overall LGTM.

I think it doesn't fix #1632 specifically as it sort the the search result alphabetically rather than how well they match with the query as per request. For example searching fire result in list containing heart_on_fire , firefighter which should be sorted based on the index of fire, result word-size and does fire is on the word boundary.

True, I'll update the description to be more precise.