A few bugs with tooltips

[CyberL1]

1. Reaction tooltips do not have a background and do not follow hovered emoji, also setting the me property to true on a reaction has no effect (all reactions have the property set to true and the last one is hovered)
   
2. The same happens to normal emojis
   
3. Timestamp tooltips also do not have the background and do not follow hovered timestamp (tested with margin-left: 200px)