Stage names can't contain any numbers or dots when created with zenstages.

Due to [cleanName](https://github.com/DarkPacks/ZenStages/blob/master/src/main/java/uk/artdude/zenstages/common/util/Helper.java#L66) implementation, all numbers and dots can't exist in stage names, they are removed immediately.
But these names are acceptable when using /gamestage command, or other gamestage addons.