[Request/All] improve in-server presence messaging

[TheGeekno72]

Is your feature request related to a problem? Please describe.
Knowing that the red warning symbol in a "welcome" message means the user left a server isn't clear enough

Describe the solution you'd like

• Option 1 (simpler) :
  turn whole message italic and strikethrough instead, maybe add a door emoji at the end?
• Option 2 :
  hovering above the icon pops up a message and depending on how they left the server (leaving, kicked out, banned, account deleted), the icon/message changes

[MathMan05]

We as a client don't know how they left, though I do like the idea of a strike through.