Don't set height via style in image editor
When resizing an image in the image editor set the height and width properties as attributes not with the style tag. when you set the height and width it makes it difficult to make the image resize automatically with the browser.
Suneel Jhangiani commented
It would be nice if we can also specify a default 'class' to be used by the image editor (ie. using 'class="img-responsive"')