Onslaught: reworks, new rounds and modifiers

For update 0.22.2, Onslaught mode has been rebuilt. This means that nuanced adjustments and new mechanics can now be applied to the mode more easily. One of those mechanics will be added on update day.

The round selection logic has also been changed (so you don't need to run all over the map to complete objectives), several new activities have been added, and the lineup and number of bots fighting you have been changed. More information here.