site starts retrieving data before I'm ready

[jvandegriff]

The data retrieval starts when the image type is selected, but there are still other choices to be made, and I don't always agree with them (it defaults to SVG but I want PNG, for example, and then it retrieves data for the SVG, and then I have to retrieve it again to get a PNG.

I would prefer if it waits for me to select everything, and there there is a "Get Data" or "Go" button.

Maybe there is a message box indicating what the app is expecting next?