message: Tweak ReadReceiptGroup to better handle disambiguation
diff: @@ -188,7 +188,7 @@ function ReadReceiptPerson({ userId, roomMember, ts, isTwelveHour, onAfterClick
  label: (
  <>
  <div className="mx_Tooltip_title">
  - { roomMember.name ?? userId }
  + { roomMember.rawDisplayName ?? userId }
  </div>
  <div className="mx_Tooltip_sub">
  { userId }
  @@ -212,7 +212,8 @@ function ReadReceiptPerson({ userId, roomMember, ts, isTwelveHour, onAfterClick
  onMouseLeave={hideTooltip}
  onFocus={showTooltip}
  onBlur={hideTooltip}
  - onWheel={hideTooltip}>
  + onWheel={hideTooltip}
  + >
  <MemberAvatar
  member={roomMember}
  fallbackUserId={userId}
  @@ -220,7 +221,9 @@ function ReadReceiptPerson({ userId, roomMember, ts, isTwelveHour, onAfterClick
  height={24}
  aria-hidden="true"
  aria-live="off"
  - resizeMethod="crop" />
  + resizeMethod="crop"
  + hideTitle
  + />
  <div className="mx_ReadReceiptGroup_name">
  <p>{ roomMember.name }</p>
  <p className="mx_ReadReceiptGroup_secondary">
  