Change default size for custom emojis

Requirements

• This is a feature request and not a bug report. Otherwise, please create a new bug report instead.
• Please check to see if this request (or a similar one) already exists.
• It's a single feature. Please don't request multiple features in one issue.

Describe the feature you'd like

Currently, custom emojis are huge by default.

I suggest setting a max with of 1.5em for custom emojis to make them more consistent with standard emojis and the text as such.

Currently:

Max with of 1.5em: