SetShockFrontFactors in LuaUnsyncedCtrl

Why are we keeping this feature commented?

https://github.com/beyond-all-reason/RecoilEngine/blob/ae7580b6bed3e18d2bc82698c028ad9765b7a722/rts/Lua/LuaUnsyncedCtrl.cpp#L238

I know it says FIXME but there is a commit that is 9 years later and probably it solved the issue

https://github.com/beyond-all-reason/RecoilEngine/blob/ae7580b6bed3e18d2bc82698c028ad9765b7a722/rts/Lua/LuaUI.cpp#L670-L696

if it needs further Fixes or the function would be a good add to the engine i can work on it

Start with the commented SetShockFrontFactors area in rts/Lua/LuaUnsyncedCtrl.cpp around line 238, then compare it with the related implementation in rts/Lua/LuaUI.cpp around lines 670-696. Determine whether the FIXME is still valid and what verification is needed; done means the feature is either safely enabled with those fixes or its continued exclusion is documented.

Written by the indexing model from the issue text.