Builtin: Fix subgame mod selection (#5367)

builtin/common/filterlist.lua

@@ -289,6 +289,9 @@ function sort_mod_list(self)
 	table.sort(self.m_processed_list, function(a, b)
 		-- Show game mods at bottom
 		if a.typ ~= b.typ then
+			if b.typ == "game" then	
+				return a.typ ~= "game_mod"
+			end
 			return b.typ == "game_mod"
 		end
 		-- If in same or no modpack, sort by name

builtin/mainmenu/modmgr.lua

@@ -238,15 +238,7 @@ function modmgr.render_modlist(render_list)
 	local list = render_list:get_list()
 	local last_modpack = nil
 	local retval = {}
-	local in_game_mods = false
 	for i, v in ipairs(list) do
-		if v.typ == "game_mod" and not in_game_mods then
-			in_game_mods = true
-			retval[#retval + 1] = mt_color_blue
-			retval[#retval + 1] = "0"
-			retval[#retval + 1] = fgettext("Subgame Mods")
-		end
-
 		local color = ""
 		if v.is_modpack then
 			local rawlist = render_list:get_raw_list()
@@ -260,7 +252,7 @@ function modmgr.render_modlist(render_list)
 					break
 				end
 			end
-		elseif v.typ == "game_mod" then
+		elseif v.typ == "game_mod" or v.typ == "game" then
 			color = mt_color_blue
 		elseif v.enabled then
 			color = mt_color_green
@@ -421,6 +413,14 @@ function modmgr.preparemodlist(data)
 	local gamespec = gamemgr.find_by_gameid(data.gameid)
 	gamemgr.get_game_mods(gamespec, game_mods)
 
+	if #game_mods > 0 then
+		-- Add title
+		retval[#retval + 1] = {
+			typ = "game",
+			name = fgettext("Subgame Mods")
+		}
+	end
+
 	for i=1,#game_mods,1 do
 		game_mods[i].typ = "game_mod"
 		retval[#retval + 1] = game_mods[i]