EN: lua linting

[Faalagorn]

Fixing just the errors in EN files (other language files needs to be adjusted) based on the errors in the https://rextester.com/l/lua_online_compiler – mostly missing commas and unescaped " and \ characters.

I also changed the comments to actual LUA ones in GameSound_EN.txt and removed the extra spaces from the keybindings.

I didn't adjust the indent/formatting for the files (they have varying space/tab and new line indents), aside from removing some, but not all, empty lines and trailing spaces.

There are also some inconsistencies how <br>, <BR>, \n and other signs are used as well as spaces between them, but I didn't touch them in this PR as well.