Is your feature request related to a problem? Please describe.
When starting the download of many files (clicking multiple Magnet links on a page for e.g.) the confirmation dialog showing where the download will be saved always pops up. In Transmission for e.g. there's an option to not prompt each time.

Describe the solution you'd like
Add a checkbox in the preferences that prevents the "Save To" dialog from showing every time a download is started.