Incremental PTR Update — Stormgate Steam update #313846

PTR 4.2.2 update (Build 107138)- Fix editor crash on right-click.- A fix to reduce frequency of camera scroll getting stuck. We have a repro and may be able to squash this one for good!- Fix concealment grasses not appearing when placed in the IGE.- Normalized announcer sound levels by reducing their volume slightly. Stormgate announcement volume was very loud, and was brought in line with other announcement levels.- Changed announcer game sound ducking behavior. Previously, when a stormgate announcement played, all other game volume was reduced by 50% during this time. Normal announcements (base is under attack) previously did not duck sounds. Now, all announcements will reduce game sound volume by 25% for a brief moment. This helps us keep announcement volume lower, without being so obnoxious, but still audible even if there's a lot of action. Please provide feedback if you think this ...