Only show attachment upload UI for not-yet-uploaded attachments.

// FREEBIE

Signal/src/ViewControllers/ConversationView/Cells/OWSMessageCell.m

@@ -712,12 +712,15 @@ NS_ASSUME_NONNULL_BEGIN
 {
     OWSAssert(attachmentView);
     OWSAssert(attachmentStateCallback);
+    OWSAssert(self.attachmentStream);
 
     if (self.isOutgoing) {
+        if (!self.attachmentStream.isUploaded) {
             self.attachmentUploadView = [[AttachmentUploadView alloc] initWithAttachment:self.attachmentStream
                                                                                superview:attachmentView
                                                                  attachmentStateCallback:attachmentStateCallback];
         }
+    }
 }
 
 - (void)cropViewToBubbbleShape:(UIView *)view