various theme changes, mostly from midi

removes duplicate round() function in productivityhelpers

Themes/default/Graphics/ScreenSelectMusic DifficultyList.lua

@@ -3,9 +3,11 @@ return Def.ActorFrame {
 		local song = GAMESTATE:GetCurrentSong(); 
 		if song then
 -- 			self:setaux(0);
+			self:finishtweening();
 			self:playcommand("TweenOn");
-		elseif not song then
+		elseif not song and self:GetZoomX() == 1 then
 -- 			self:setaux(1);
+			self:finishtweening();
 			self:playcommand("TweenOff");
 		end;
 	end;