Editor - hitsound volume should be inherited from the previous object

[Digitalfear117]

Whenever I place a new circle on my map, the hitsound volume gets set back to the default of 100%, which is really annoying since I constantly have to change the hit sound volume to the previous one for every placed object…. I think it should just inherit the previous volume unless the user goes out of their way to change it.

This seems similar to #18725, where the sample set is retained, but it would be nice if the volume % was retained too!