I liked the streamlined implementation of the Twitter button in previous Jetpack versions. I don't want to append "@jetpack" (or any other handle) to the tweet. I don't want the Jetpack sharing advertisement after the tweet is submitted. I want the popup window to close by itself.
I'm not a dev, but am OK with tinkering in functions.php, plugins, etc. If anyone can help me get pointed in the right direction, would be much appreciated!