Button in .mx_TagComposer has missing padding in some languages

[libexus]

Steps to reproduce

1. Go to the Tag Composer in Settings -> Notifications
2. Change the button's text to something longer using the inspector (or change the language to german)
3. There is no padding at the left and right of the button

What happened?

What did you expect?

padding on the left and right of the button

Operating system

Linux

Browser information

Firefox 91.0.1

URL for webapp

develop.element.io

Have you submitted a rageshake?

No