Eliminate space around emoji (#5474)

* Eliminate space around emoji

* More improve emoji style

* Make more compatible with Twemoji

* Make scss-lint happy

* Make not modify normal emoji's behavior

* Decrease status__action-bar's margin-top to 5px

* Make the test be passed

* Revert "Make the test be passed"

This reverts commit 54a8c60e5907ef20a5ceb5ab2c86a933e06f3ece.

* Revert "Make not modify normal emoji's behavior"

This reverts commit 6a5bdf0c11df16ebd190cb3ab9d2e8f1349f435a.