adding PlayerOptions onto ScreenSelectMusic

metrics.ini

# new metrics for player options placement
[ScreenSelectMusic]
PlayerOptionsP1X=
PlayerOptionsP1Y=
PlayerOptionsP1OnCommand=
PlayerOptionsP1OffCommand=

PlayerOptionsP2X=
PlayerOptionsP2Y=
PlayerOptionsP2OnCommand=
PlayerOptionsP2OffCommand=

ScreenSelectMusic decorations.lua

-- BGAnimations/ScreenSelectMusic decorations.lua
local t = Def.ActorFrame {}

for pn in ivalues(PlayerNumber) do
	-- and add this just before the end:
	local PlayerOptions = LoadActor( THEME:GetPathG( Var "LoadingScreen", "PlayerOptions" ), pn );
	t[#t+1] = StandardDecorationFromTable( "PlayerOptions" .. ToEnumShortString(pn), PlayerOptions );
end

return t

ScreenSelectMusic PlayerOptions.lua

-- Graphics/ScreenSelectMusic PlayerOptions.lua
-- player options text for selectmusic
local Player = ...
if not Player then error("ScreenSelectMusic PlayerOptions requires a Player") end

return Def.ActorFrame{
	LoadFont("Common normal")..{
		InitCommand=cmd(zoom,1);
		BeginCommand=cmd(playcommand,"Update");
		PlayerOptionsChangedMessageCommand=function(self,param)
			if param.PlayerNumber == Player then self:playcommand("Update") end
		end;
		UpdateCommand=function(self)
			local pstate = GAMESTATE:GetPlayerState(Player)
			self:settext(pstate:GetPlayerOptionsString('ModsLevel_Preferred'))
		end;
	};
};