More Accurate Periscope Sights

Edits the periscope sight to be more useful and (mostly) accurate. Calibrated to my bearing marker mod (not required) and DECAFBAD's Stadimeter mrad mod (also not required). Has a milliradian vertical scale and a degree horizontal scale. Savegame compatible. Compatible for versions 2025. 1+. Will be incompatible with previous versions. Information on markings: "/17. 45°" refers to the conversion of milliradian to degrees. Useful for the aspect ratio AOB method. EXTENDED mode only: "x1/x2. 5/x10" refers to the sight magnification relative to the lowest level. Useful for manual range calculations e.g. range (km) = (height (m) / mrad) * magnification. A giant heaping thank you to Tofof (Workshop: https://steamcommunity.com/id/tofof/myworkshopfiles/?appid=494840) for figuring out a workaround to the dim bearing illumination.