Rollback saving

[Katsute]

Describe the content or mechanics you are proposing.
Save the last few waves and allow voting the return to a wave (for local servers).

Describe how you think this content will improve the game. If you're proposing new content, mention how it may add more gameplay options or how it will fill a new niche.
Some global servers do have save rollbacks, but for local servers there really isn't any protection against griefers.

Before making this issue, replace the underscores in the following boxes with an X to confirm that you have acknowledged them. Failure to do so may result in your request being closed automatically.

you should also fix this template so the checkbox isn't selected by default

1. I have done a quick search in the list of suggestions to make sure this has not been suggested yet.
2. I am familiar with all the content already in the game or have glanced at the wiki to make sure my suggestion doesn't exist in the game yet.