tweak: only fetch and show 5 reactors for open group reactions

SessionMessagingKit/Messages/Message.swift

@@ -369,8 +369,11 @@ public extension Message {
                let reactors = rawReaction.reactors
             {
                 let timestampMs: Int64 = Int64(floor((Date().timeIntervalSince1970 * 1000)))
+                let maxLength: Int = !rawReaction.you || reactors.contains(userPublicKey) ? 5 : 4
                 let desiredReactorIds: [String] = reactors
                     .filter { $0 != blindedUserPublicKey }
+                    .prefix(maxLength)
+                    .map{ $0 }
 
                 results = results
                     .appending( // Add the first reaction (with the count)

SessionMessagingKit/Open Groups/OpenGroupAPI.swift

@@ -99,7 +99,7 @@ public enum OpenGroupAPI {
                                 ),
                                 queryParameters: [
                                     .updateTypes: UpdateTypes.reaction.rawValue,
-                                    .reactors: "20"
+                                    .reactors: "5"
                                 ]
                             ),
                             responseType: [Failable<Message>].self