Couple visual issues I've run into.
1. When you click the button to insert a link, the checkbox for opening the link in a new window overlaps with the next line. Please see screenshot I took from the documentation example.
2. When the toolbar wraps to a second line (such as in the screenshot where "Font Name" begins the second row) I think there should be at least a small gap between the 2 rows. This is especially distracting with the Bootstrap theme where items are a little bigger.
Thanks.