Consider group send a failure if sending to any member in the group fails.

// FREEBIE

src/Messages/OWSMessageSender.m

@@ -682,26 +682,12 @@ NSString *const OWSMessageSenderRateLimitedException = @"RateLimitedException";
     [completionFuture catchDo:^(id failure) {
         // failure from toc_thenAll yeilds an array of failed Futures, rather than the future's failure.
         if ([failure isKindOfClass:[NSArray class]]) {
-            NSArray *errors = (NSArray *)failure;
-            for (TOCFuture *failedFuture in errors) {
-                if (!failedFuture.hasFailed) {
-                    // If at least one send succeeded, don't show message as failed.
-                    // Else user will tap-to-resend to all recipients, including those that already received the
-                    // message.
-                    return successHandler();
-                }
-            }
-
-            // At this point, all recipients must have failed.
-            // But we have all this verbose type checking because TOCFuture doesn't expose type information.
-            id lastError = errors.lastObject;
-            if ([lastError isKindOfClass:[TOCFuture class]]) {
-                TOCFuture *failedFuture = (TOCFuture *)lastError;
-                if (failedFuture.hasFailed) {
-                    id failureResult = failedFuture.forceGetFailure;
+            NSArray *groupSendFutures = (NSArray *)failure;
+            for (TOCFuture *groupSendFuture in groupSendFutures) {
+                if (groupSendFuture.hasFailed) {
+                    id failureResult = groupSendFuture.forceGetFailure;
                     if ([failureResult isKindOfClass:[NSError class]]) {
-                        // Generally we assume that failures are retryable
-                        return failureHandler((NSError *)failureResult, YES);
+                        return failureHandler(failureResult, YES);
                     }
                 }
             }