ReactionChip tooltip title for many users

[Schwehn42]

When many users react to with the same reaction to the same note, the tooltip gets out of hand. We should define a new way to display the tooltip title in this component.
One suggestion was the following:

And for the tooltips, we can show the initial 2 to 3 person name followed by the count of remaining person. For example for 6 person reactions we can show something like ->
person1 , person2, (+4) .

Originally posted by @dipesh1903 in #3895 (comment)