Fix unexpected and inconsistent inheritance of line-height property for mx_TextualEvent (#8485)
Fix unexpected and inconsistent inheritance of line-height property for mx_TextualEvent (#8485)

- IRC layout: unspecified
- Modern layout: $font-22px (with _GroupLayout.scss)
- Bubble layout: $font-18px (with _EventBubbleTile.scss)

Signed-off-by: Suguru Hirahara <4ee41141f41dad19127963eb65a2461cc3bc0d81@users.noreply.github.com>
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk