Fix custom maps bug showing white block in MP

- now searches usermaps folder for folders prefixed with "mp_"

data/ui_scripts/frontend_menus/DataSources_ChangeMapCategories.lua

@@ -0,0 +1,98 @@
+local f0_local0 = function ( f1_arg0, f1_arg1 )
+	if not CoD.useMouse then
+		return 
+	else
+		LUI.OverrideFunction_CallOriginalFirst( f1_arg0, "setState", function ( element, controller )
+			if IsSelfInState( f1_arg0, "SelectingMap" ) then
+				f1_arg0.mapList:setMouseDisabled( false )
+				f1_arg0.mapCategoriesList:setMouseDisabled( true )
+				f1_arg0.m_categorySet = false
+			else
+				f1_arg0.mapList:setMouseDisabled( true )
+				f1_arg0.mapCategoriesList:setMouseDisabled( false )
+			end
+		end )
+		f1_arg0.mapList:setMouseDisabled( true )
+		f1_arg0.mapList:registerEventHandler( "leftclick_outside", function ( element, event )
+			if IsSelfInState( f1_arg0, "SelectingMap" ) and f1_arg0.m_categorySet then
+				CoD.PCUtil.SimulateButtonPress( f1_arg1, Enum.LUIButton.LUI_KEY_XBB_PSCIRCLE )
+			end
+			f1_arg0.m_categorySet = true
+			return true
+		end )
+	end
+end
+
+local PostLoadFunc = function ( f4_arg0, f4_arg1 )
+	f0_local0( f4_arg0, f4_arg1 )
+end
+
+local f0_local2 = 10000
+local f0_local3 = 10001
+local f0_local4 = function ( f5_arg0 )
+	local f5_local0 = CoD.mapsTable[f5_arg0]
+	if CoD.CONTENT_DLC6_INDEX <= f5_local0.dlc_pack or f5_arg0 == "mp_redwood_ice" or f5_arg0 == "mp_veiled_heyday" then
+		return f0_local3
+	elseif f5_local0.dlc_pack > 0 then
+		return f0_local2
+	else
+		return f5_local0.dlc_pack
+	end
+end
+
+DataSources.ChangeMapCategories = DataSourceHelpers.ListSetup( "ChangeMapCategories", function ( f6_arg0 )
+	local f6_local0 = {}
+	local f6_local1 = CoD.GetMapValue( Engine.DvarString( nil, "ui_mapname" ), "dlc_pack", CoD.CONTENT_ORIGINAL_MAP_INDEX )
+	local f6_local2 = function ( f7_arg0, f7_arg1 )
+		return {
+			models = {
+				text = Engine.Localize( "MPUI_MAP_CATEGORY_" .. f7_arg0 .. "_CAPS" ),
+				buttonText = Engine.Localize( "MPUI_MAP_CATEGORY_" .. f7_arg0 .. "_CAPS" ),
+				image = "playlist_map",
+				description = Engine.Localize( "MPUI_MAP_CATEGORY_" .. f7_arg0 .. "_DESC" )
+			},
+			properties = {
+				category = f7_arg1,
+				selectIndex = f6_local1 == f7_arg1
+			}
+		}
+	end
+	
+	CoD.mapsTable = Engine.GetGDTMapsTable()
+	local f6_local3 = function ( f8_arg0 )
+		for f8_local3, f8_local4 in pairs( CoD.mapsTable ) do
+			if f8_local4.session_mode == CoD.gameModeEnum and f0_local4( f8_local3 ) == f8_arg0 and (ShowPurchasableMap( f6_arg0, f8_local3 ) or Engine.IsMapValid( f8_local3 )) then
+				return true
+			end
+		end
+		return false
+	end
+	
+	if CoD.isCampaign == true then
+		table.insert( f6_local0, f6_local2( "missions", CoD.CONTENT_ORIGINAL_MAP_INDEX ) )
+		table.insert( f6_local0, f6_local2( "dev", CoD.CONTENT_DEV_MAP_INDEX ) )
+	else
+		table.insert( f6_local0, f6_local2( "standard", CoD.CONTENT_ORIGINAL_MAP_INDEX ) )
+		if not Dvar.ui_execdemo:get() and f6_local3( f0_local2 ) then
+			table.insert( f6_local0, f6_local2( "dlc", f0_local2 ) )
+		end
+		if not Dvar.ui_execdemo:get() and f6_local3( f0_local3 ) then
+			table.insert( f6_local0, f6_local2( "dlc_bonus", f0_local3 ) )
+		end
+		if Mods_Enabled() then --and Engine.Mods_Lists_GetInfoEntries( LuaEnums.USERMAP_BASE_PATH, 0, Engine.Mods_Lists_GetInfoEntriesCount( LuaEnums.USERMAP_BASE_PATH ) ) ~= nil then
+			
+			local f9_local11 = Engine.Mods_Lists_GetInfoEntries( LuaEnums.USERMAP_BASE_PATH, 0, Engine.Mods_Lists_GetInfoEntriesCount( LuaEnums.USERMAP_BASE_PATH ) )
+			if f9_local11 then
+				for f9_local12 = 0, #f9_local11, 1 do
+					local f9_local17 = f9_local11[f9_local12]
+					if LUI.startswith( f9_local17.internalName, "mp_" ) then
+		
+						table.insert( f6_local0, f6_local2( "mods", CoD.CONTENT_MODS_INDEX ) )
+					end
+				end
+			end
+		end
+	end
+	return f6_local0
+end, true )
+

data/ui_scripts/frontend_menus/__init__.lua

@@ -6,6 +6,7 @@ local EnableLobbyMapVote = true -- toggle map vote in public lobby
 
 local utils = require("utils")
 require("DataSources_StartMenuTabs")
+require("DataSources_ChangeMapCategories")
 require("DataSources_GameSettingsFlyoutButtons")
 
 CoD.LobbyButtons.MP_PUBLIC_MATCH = {