Fixed bug in Things Filters which caused removed flag settings to be restored after DB restart.

Source/Core/Config/ConfigurationInfo.cs

@@ -167,6 +167,7 @@ namespace CodeImp.DoomBuilder.Config
 			resources.WriteToConfig(General.Settings.Config, "configurations." + settingskey + ".resources");
 			
 			// Write filters to configuration
+			General.Settings.DeleteSetting("configurations." + settingskey + ".thingsfilters");
 			for(int i = 0; i < thingsfilters.Count; i++)
 			{
 				thingsfilters[i].WriteSettings(General.Settings.Config,

Source/Core/Config/ProgramConfiguration.cs

@@ -419,6 +419,10 @@ namespace CodeImp.DoomBuilder.Config
 		internal bool WriteSetting(string setting, object settingvalue) { return cfg.WriteSetting(setting, settingvalue); }
 		internal bool WriteSetting(string setting, object settingvalue, string pathseperator) { return cfg.WriteSetting(setting, settingvalue, pathseperator); }
 
+		// DeleteSetting
+		internal bool DeleteSetting(string setting) { return cfg.DeleteSetting(setting); }
+		internal bool DeleteSetting(string setting, string pathseperator) { return cfg.DeleteSetting(setting, pathseperator); }
+
 		#endregion
 
 		#region ================== Default Settings