When using the pretty theme, I can't seem to resize images properly. When hovering over the image, a yellow border appears, that says "drag this to resize" in the bottom, but a part of the yellow border is obscured by a white area:

When I move my mouse down to the "drag this to resize", it passes over the white area and the yellow border disappears. If I carefully navigate the mouse over the left side of the yellow border, around the white area, I can reach the "drag this to resize" and resize the image as expected.

The above was tested using Chrome 49 and this example: https://wymeditor.github.io/wymeditor/dist/examples/17-pretty-theme.html. In Firefox 45, I see something similar in my embedded version of wymeditor, though in that particular example (as well as the basic example), resizing does not work at all with Firefox.