Post-Release Day 4 Update

A slightly smaller patch since it's a public holiday here, but we're still working.

• Fixed issue with Scourge's Battle Power having incorrect poison damage values.

• Fixed music continuing to play during Mission Editor after playing a mission through the editor.

• Fixed edge case with movement calculator where some units were not showing the final tile as available.

• Fixed rare crash with some fog-of-war interactions.

The first stage of work to upload custom maps to our dedicated servers has been completed. We need to do some supporting UI work before the feature is enabled for everyone, so look out for that in a patch very soon.