Add lookup table for Hedgewars key IDs instead of generating IDs on the fly This makes sure the key IDs never change. Previous implementation abused SDL_GetScancodeName to generate the IDs programmatically, which was not reliable and explicitly adviced against in the SDL documentation <https://wiki.libsdl.org/SDL_GetScancodeName#Remarks>.

#!/bin/sh -
echo "*** Luacheck of Lua locale files:"
luacheck ../share/hedgewars/Data/Locale/*.lua --globals locale -q
echo "Missing translations in Lua locale files:"
grep -c -- "^--" ../share/hedgewars/Data/Locale/*.lua