[IMPROVE] New component and better look for tooltips

[ggazzo]

Proposed changes

Issue(s)

How to test or reproduce

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Hotfix (a major bugfix that has to be merged asap)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Changelog

Further comments

[TBG-FR]

@ggazzo Do you know which tooltip element/component is used when we hover on a mention/@username tag ? Shouldn't it use the component you created ? (I was wandering in the code to find that because I need to customize them for a dark theme, and found out they weren't the same...)

"Emoji" tooltip

"Mention" tooltip

Same screenshots, after adding a background-color on .tooltip show