fix: issues related to the emoji icon picker

[asjqkkkk]

• Fix: remove the scrolling conflict of the icon picker on macOS
• Fix: the icon is not supported in sites tab

Feature Preview

• Feat: keep the icon panel open after click ramdom
• Feat: the type of selector opened depends on the already set icon or emoji
• Feat: the skin tone of the random emoji follows the selected skin ton
• Feat: save ramdom icon in recent section

PR Checklist

• My code adheres to AppFlowy's Conventions
• I've listed at least one issue that this PR fixes in the description above.
• I've added a test(s) to validate changes in this PR, or this PR only contains semantic changes.
• All existing tests are passing.