can't scroll the right sidebar in Chrome when using email builder and adding a button

I can’t scroll in Chrome when using email builder and adding a button:



Check video here:



http://screencast.com/t/eCbXO2xXy



Thank you

I can’t scroll in Chrome when using email builder and adding a button:

Check video here:

http://screencast.com/t/eCbXO2xXy

Thank you