Fix "can't send same GIF twice" issue.

// FREEBIE

Signal/src/ViewControllers/ConversationView/ConversationViewController.m

@@ -3242,9 +3242,6 @@ typedef NS_ENUM(NSInteger, MessagesRangeSizeMode) {
     OWSAssert([NSThread isMainThread]);
     OWSAssert(message);
 
-    [self.editingDatabaseConnection readWriteWithBlock:^(YapDatabaseReadWriteTransaction *transaction) {
-        [message saveWithTransaction:transaction];
-    }];
     [self updateLastVisibleTimestamp:message.timestampForSorting];
     self.lastMessageSentDate = [NSDate new];
     [self clearUnreadMessagesIndicator];

SignalServiceKit/src/Util/DataSource.m

@@ -300,6 +300,20 @@ NS_ASSUME_NONNULL_BEGIN
     return instance;
 }
 
+- (void)setFilePath:(NSString *)filePath
+{
+    OWSAssert(filePath.length > 0);
+
+#ifdef DEBUG
+    BOOL isDirectory;
+    BOOL exists = [[NSFileManager defaultManager] fileExistsAtPath:filePath isDirectory:&isDirectory];
+    OWSAssert(exists);
+    OWSAssert(!isDirectory);
+#endif
+
+    _filePath = filePath;
+}
+
 - (NSData *)data
 {
     OWSAssert(self.filePath);