Add new 5.1 default theme Lambda

I'd like to thank everyone who made this possible;, including but not
limited to Riakodoadm, MrThatKid, kyzentun, Luizsan, JoseVarelaP,
everyone else who provided feedback and bug reports.

Themes/default/Graphics/ScreenTitleMenu TimingDifficulty.lua

@@ -1,26 +1,7 @@
-local label_text= false
-return Def.ActorFrame {
-	LoadFont("Common Normal") .. {
-		Text=GetTimingDifficulty();
-		AltText="";
-		InitCommand=cmd(horizalign,left;zoom,0.675);
-		OnCommand= function(self)
-			label_text= self
-			self:shadowlength(1):settextf(Screen.String("TimingDifficulty"), "");
-		end,
-	};
-	LoadFont("Common Normal") .. {
-		Text=GetTimingDifficulty();
-		AltText="";
-		InitCommand=cmd(x,136;zoom,0.675;halign,0);
-		OnCommand=function(self)
-			self:shadowlength(1):skewx(-0.125):x(label_text:GetZoomedWidth()+8)
-			if GetTimingDifficulty() == 9 then
-				self:settext(Screen.String("Hardest Timing"));
-				(cmd(zoom,0.5;diffuse,ColorLightTone( Color("Orange")) ))(self);
-			else
-				self:settext( GetTimingDifficulty() );
-			end
-		end;
-	};
-};
+local icon_params = {
+	base_color = color("#CE3D06"),
+	label_text = Screen.String("TimingDifficulty"),
+	value_text = GetTimingDifficulty() == 9 and Screen.String("Hardest Timing") or GetTimingDifficulty()
+}
+
+return LoadActor(THEME:GetPathG("", "_title_info_icon"), icon_params)