Merge GetMissionPath to one function

project/code/LGS/ResourcePathManager.cs

@@ -93,26 +93,24 @@ public class ResourcePathManager
         return names;
     }
 
-    public string GetMissionPath(string missionName)
-    {
-        if (!_initialised) return null;
-
-        if (_omResources.missionPathMap.TryGetValue(missionName, out var path))
-        {
-            return path;
-        }
-        return null;
-    }
-
     public string GetMissionPath(string campaignName, string missionName)
     {
         if (!_initialised) return null;
 
-        if (_fmResources.TryGetValue(campaignName, out var campaign) &&
+        if (campaignName == null || campaignName == "")
-            campaign.missionPathMap.TryGetValue(missionName, out var path))
         {
-            return path;
+            if (_omResources.missionPathMap.TryGetValue(missionName, out var omPath))
+            {
+                return omPath;
             }
+        }
+        else if (
+            _fmResources.TryGetValue(campaignName, out var campaign) &&
+            campaign.missionPathMap.TryGetValue(missionName, out var fmPath))
+        {
+            return fmPath;
+        }
+
         return null;
     }
 

project/code/TMV/Mission.cs

@@ -50,16 +50,8 @@ public partial class Mission : Node3D
 		var missionSelector = GetNode<Control>("%MissionSelector") as MissionSelector;
 		missionSelector.pathManager = _installPaths;
 		missionSelector.MissionSelected += (string campaign, string mission) =>
-		{
-			if (campaign == null)
-			{
-				FileName = _installPaths.GetMissionPath(mission);
-			}
-			else
 		{
 			FileName = _installPaths.GetMissionPath(campaign, mission);
-			}
-
 			Build = true;
 		};
 	}