Remove delivered notifications for rooms that have meantime become fully read and have messages newer than what's delivered

- this is a best effort solution to cleanup outdated notifications when using multiple clients and reading them elsewhere

ElementX/Sources/Services/Room/RoomSummary/RoomSummary.swift

@@ -40,6 +40,7 @@ struct RoomSummary {
     let avatarURL: URL?
     let heroes: [UserProfileProxy]
     let lastMessage: AttributedString?
+    let lastMessageDate: Date?
     let lastMessageFormattedTimestamp: String?
     let unreadMessagesCount: UInt
     let unreadMentionsCount: UInt
@@ -95,6 +96,7 @@ extension RoomSummary {
         avatarURL = nil
         heroes = []
         lastMessage = AttributedString(string)
+        lastMessageDate = .now
         lastMessageFormattedTimestamp = "Now"
         unreadMessagesCount = hasUnreadMessages ? 1 : 0
         unreadMentionsCount = hasUnreadMentions ? 1 : 0

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProvider.swift

@@ -242,10 +242,12 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
         }
         
         var attributedLastMessage: AttributedString?
+        var lastMessageDate: Date?
         var lastMessageFormattedTimestamp: String?
         
         if let latestRoomMessage = roomDetails.latestEvent {
             let lastMessage = EventTimelineItemProxy(item: latestRoomMessage, uniqueID: .init("0"))
+            lastMessageDate = lastMessage.timestamp
             lastMessageFormattedTimestamp = lastMessage.timestamp.formattedMinimal()
             attributedLastMessage = eventStringBuilder.buildAttributedString(for: lastMessage)
         }
@@ -271,6 +273,7 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
                            avatarURL: roomInfo.avatarUrl.flatMap(URL.init(string:)),
                            heroes: roomInfo.heroes.map(UserProfileProxy.init),
                            lastMessage: attributedLastMessage,
+                           lastMessageDate: lastMessageDate,
                            lastMessageFormattedTimestamp: lastMessageFormattedTimestamp,
                            unreadMessagesCount: UInt(roomInfo.numUnreadMessages),
                            unreadMentionsCount: UInt(roomInfo.numUnreadMentions),