Merge changes I69b33b0c,If904c85e,I28444df4,I3bfa4580,I88d9667d, ... into rvc-dev

* changes:
  Decrease avatar and sender name sizes in MessagingStyle
  Fixed various conversation layout appearences
  Implemented FacePile if no group icon is present
  Fixed the behavior of headers in conversation groups
  Ensured correct coloring of badge in dark mode
  Fixed an issue where the bubble badge was visible independent of the icon
  Improved transitions for expanding messaging notifications
  Adjusted single line representation to include a colon
  Made the expand button positioning conditional on expanded state
  Ensured that the sender of the first message is hidden
  Baseline for the new ConversationLayout