Fixed a crash which could occur while processing message request notifications due to not using a DB transaction

Session/Notifications/AppNotifications.swift

@@ -175,7 +175,7 @@ public class NotificationPresenter: NSObject, NotificationsProtocol {
         }
         else if thread.isMessageRequest() && CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
             // If there are other interactions on this thread already then don't show the notification
-            if thread.numberOfInteractions() > 1 { return }
+            if thread.numberOfInteractions(with: transaction) > 1 { return }
             
             CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] = false
         }

SessionMessagingKit/Threads/TSThread.h

@@ -67,6 +67,8 @@ BOOL IsNoteToSelfEnabled(void);
  */
 - (NSUInteger)numberOfInteractions;
 
+- (NSUInteger)numberOfInteractionsWithTransaction:(YapDatabaseReadTransaction *)transaction;
+
 - (NSUInteger)unreadMessageCountWithTransaction:(YapDatabaseReadTransaction *)transaction
     NS_SWIFT_NAME(unreadMessageCount(transaction:));
 

SessionMessagingKit/Threads/TSThread.m

@@ -233,12 +233,17 @@ BOOL IsNoteToSelfEnabled(void)
 {
     __block NSUInteger count;
     [[self dbReadConnection] readWithBlock:^(YapDatabaseReadTransaction *transaction) {
-        YapDatabaseViewTransaction *interactionsByThread = [transaction ext:TSMessageDatabaseViewExtensionName];
-        count = [interactionsByThread numberOfItemsInGroup:self.uniqueId];
+        count = [self numberOfInteractionsWithTransaction:transaction];
     }];
     return count;
 }
 
+- (NSUInteger)numberOfInteractionsWithTransaction:(YapDatabaseReadTransaction *)transaction
+{
+    YapDatabaseViewTransaction *interactionsByThread = [transaction ext:TSMessageDatabaseViewExtensionName];
+    return [interactionsByThread numberOfItemsInGroup:self.uniqueId];
+}
+
 - (NSArray<id<OWSReadTracking>> *)unseenMessagesWithTransaction:(YapDatabaseReadTransaction *)transaction
 {
     NSMutableArray<id<OWSReadTracking>> *messages = [NSMutableArray new];

SessionNotificationServiceExtension/NSENotificationPresenter.swift

@@ -22,7 +22,7 @@ public class NSENotificationPresenter: NSObject, NotificationsProtocol {
         }
         else if thread.isMessageRequest() && CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] {
             // If there are other interactions on this thread already then don't show the notification
-            if thread.numberOfInteractions() > 1 { return }
+            if thread.numberOfInteractions(with: transaction) > 1 { return }
             
             CurrentAppContext().appUserDefaults()[.hasHiddenMessageRequests] = false
         }