Occasionally blank visualization when hitting apply

[stormpython]

After creating a tag cloud and altering the options or hitting refresh on the dashboard and in visualize, there is a blank visualization. Inspecting the editor shows that something has been drawn, but its usually only one word of text instead of the number that should be visualized.

[stormpython]

This is happening because the size of the element is a zero width and a zero height. This needs to be fixed inside the directive code. Possible a race condition where the vis code is being run before the element has a size.