ui: show observer role in list of members (#3679)

apps/multiplatform/common/src/commonMain/kotlin/chat/simplex/common/views/chat/group/GroupChatInfoView.kt

@@ -402,7 +402,7 @@ private fun MemberRow(member: GroupMember, user: Boolean = false, onClick: (() -
       }
     }
     val role = member.memberRole
-    if (role == GroupMemberRole.Owner || role == GroupMemberRole.Admin) {
+    if (role in listOf(GroupMemberRole.Owner, GroupMemberRole.Admin, GroupMemberRole.Observer)) {
       Text(role.text, color = MaterialTheme.colors.secondary)
     }
   }