Normalize conversation presentation logic.

// FREEBIE

Signal/src/environment/Environment.m

@@ -200,15 +200,16 @@ static Environment *environment = nil;
                   keyboardOnViewAppearing:(BOOL)keyboardOnViewAppearing
                       callOnViewAppearing:(BOOL)callOnViewAppearing
 {
+    DispatchMainThreadSafe(^{
+        __block TSThread *thread = nil;
         [[TSStorageManager sharedManager].dbReadWriteConnection
-        asyncReadWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
+            readWriteWithBlock:^(YapDatabaseReadWriteTransaction *_Nonnull transaction) {
-            TSThread *thread = [TSContactThread getOrCreateThreadWithContactId:recipientId transaction:transaction];
+                thread = [TSContactThread getOrCreateThreadWithContactId:recipientId transaction:transaction];
-            dispatch_async(dispatch_get_main_queue(), ^{
+            }];
         [self presentConversationForThread:thread
                    keyboardOnViewAppearing:keyboardOnViewAppearing
                        callOnViewAppearing:callOnViewAppearing];
     });
-        }];
 }
 
 + (void)presentConversationForThread:(TSThread *)thread