Prevent re-submitting form content in tickets on page reload / browser navigation

[qubodup]

It happened multiple times recently that users wrote the same message in one ticket. Just now it happened with 23 h delay: https://freesound.org/tickets/cfbaf4a915b44117935548b169cb222a/

The reason clearly is: they kept the page open, came back to the browser the next day, page got reloaded and they accepted the re-submitting of data because to this day there's no consistency what happens with these.

When posting comments, this doesn't happen thankfully. You can CTRL+R or F5 without the modal showing up or content getting re-posted. Editing your profile and editing sound metadata (and then going back in the browser) also doesn't have this behavior.

Basic searching lead to the solution being POST-REDIRECT-GET https://stackoverflow.com/questions/7897194/how-to-prevent-user-re-sending-the-form-data